diff --git a/src/SMAPI/Events/ChangeType.cs b/src/SMAPI/Events/ChangeType.cs
deleted file mode 100644
index 0fc717df..00000000
--- a/src/SMAPI/Events/ChangeType.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-namespace StardewModdingAPI.Events
-{
-    /// <summary>Indicates how an inventory item changed.</summary>
-    public enum ChangeType
-    {
-        /// <summary>The entire stack was removed.</summary>
-        Removed,
-
-        /// <summary>The entire stack was added.</summary>
-        Added,
-
-        /// <summary>The stack size changed.</summary>
-        StackChange
-    }
-}
diff --git a/src/SMAPI/Framework/CommandManager.cs b/src/SMAPI/Framework/CommandManager.cs
index df798b0c..80c08f34 100644
--- a/src/SMAPI/Framework/CommandManager.cs
+++ b/src/SMAPI/Framework/CommandManager.cs
@@ -36,11 +36,10 @@ namespace StardewModdingAPI.Framework
         /// <param name="name">The command name, which the user must type to trigger it.</param>
         /// <param name="documentation">The human-readable documentation shown when the player runs the built-in 'help' command.</param>
         /// <param name="callback">The method to invoke when the command is triggered. This method is passed the command name and arguments submitted by the user.</param>
-        /// <param name="allowNullCallback">Whether to allow a null <paramref name="callback"/> argument; this should only used for backwards compatibility.</param>
         /// <exception cref="ArgumentNullException">The <paramref name="name"/> or <paramref name="callback"/> is null or empty.</exception>
         /// <exception cref="FormatException">The <paramref name="name"/> is not a valid format.</exception>
         /// <exception cref="ArgumentException">There's already a command with that name.</exception>
-        public CommandManager Add(IModMetadata mod, string name, string documentation, Action<string, string[]> callback, bool allowNullCallback = false)
+        public CommandManager Add(IModMetadata mod, string name, string documentation, Action<string, string[]> callback)
         {
             name = this.GetNormalizedName(name);
 
@@ -49,7 +48,7 @@ namespace StardewModdingAPI.Framework
                 throw new ArgumentNullException(nameof(name), "Can't register a command with no name.");
             if (name.Any(char.IsWhiteSpace))
                 throw new FormatException($"Can't register the '{name}' command because the name can't contain whitespace.");
-            if (callback == null && !allowNullCallback)
+            if (callback == null)
                 throw new ArgumentNullException(nameof(callback), $"Can't register the '{name}' command because without a callback.");
 
             // ensure uniqueness
diff --git a/src/SMAPI/Framework/ModLoading/ModResolver.cs b/src/SMAPI/Framework/ModLoading/ModResolver.cs
index 2842c11a..4fdeefbc 100644
--- a/src/SMAPI/Framework/ModLoading/ModResolver.cs
+++ b/src/SMAPI/Framework/ModLoading/ModResolver.cs
@@ -394,22 +394,6 @@ namespace StardewModdingAPI.Framework.ModLoading
             }
         }
 
-        /// <summary>Get all mod folders in a root folder, passing through empty folders as needed.</summary>
-        /// <param name="rootPath">The root folder path to search.</param>
-        private IEnumerable<DirectoryInfo> GetModFolders(string rootPath)
-        {
-            foreach (string modRootPath in Directory.GetDirectories(rootPath))
-            {
-                DirectoryInfo directory = new(modRootPath);
-
-                // if a folder only contains another folder, check the inner folder instead
-                while (!directory.GetFiles().Any() && directory.GetDirectories().Length == 1)
-                    directory = directory.GetDirectories().First();
-
-                yield return directory;
-            }
-        }
-
         /// <summary>Get the dependencies declared in a manifest.</summary>
         /// <param name="manifest">The mod manifest.</param>
         /// <param name="loadedMods">The loaded mods.</param>
diff --git a/src/SMAPI/Framework/Reflection/Reflector.cs b/src/SMAPI/Framework/Reflection/Reflector.cs
index d5938c3f..c6fc2c79 100644
--- a/src/SMAPI/Framework/Reflection/Reflector.cs
+++ b/src/SMAPI/Framework/Reflection/Reflector.cs
@@ -1,7 +1,6 @@
 #nullable disable
 
 using System;
-using System.Linq;
 using System.Reflection;
 using System.Runtime.Caching;
 
@@ -128,41 +127,6 @@ namespace StardewModdingAPI.Framework.Reflection
             return method;
         }
 
-        /****
-        ** Methods by signature
-        ****/
-        /// <summary>Get a instance method.</summary>
-        /// <param name="obj">The object which has the method.</param>
-        /// <param name="name">The field name.</param>
-        /// <param name="argumentTypes">The argument types of the method signature to find.</param>
-        /// <param name="required">Whether to throw an exception if the field is not found.</param>
-        public IReflectedMethod GetMethod(object obj, string name, Type[] argumentTypes, bool required = true)
-        {
-            // validate parent
-            if (obj == null)
-                throw new ArgumentNullException(nameof(obj), "Can't get a instance method from a null object.");
-
-            // get method from hierarchy
-            ReflectedMethod method = this.GetMethodFromHierarchy(obj.GetType(), obj, name, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public, argumentTypes);
-            if (required && method == null)
-                throw new InvalidOperationException($"The {obj.GetType().FullName} object doesn't have a '{name}' instance method with that signature.");
-            return method;
-        }
-
-        /// <summary>Get a static method.</summary>
-        /// <param name="type">The type which has the method.</param>
-        /// <param name="name">The field name.</param>
-        /// <param name="argumentTypes">The argument types of the method signature to find.</param>
-        /// <param name="required">Whether to throw an exception if the field is not found.</param>
-        public IReflectedMethod GetMethod(Type type, string name, Type[] argumentTypes, bool required = true)
-        {
-            // get field from hierarchy
-            ReflectedMethod method = this.GetMethodFromHierarchy(type, null, name, BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static, argumentTypes);
-            if (required && method == null)
-                throw new InvalidOperationException($"The {type.FullName} object doesn't have a '{name}' static method with that signature.");
-            return method;
-        }
-
 
         /*********
         ** Private methods
@@ -232,27 +196,6 @@ namespace StardewModdingAPI.Framework.Reflection
                 : null;
         }
 
-        /// <summary>Get a method from the type hierarchy.</summary>
-        /// <param name="type">The type which has the method.</param>
-        /// <param name="obj">The object which has the method.</param>
-        /// <param name="name">The method name.</param>
-        /// <param name="bindingFlags">The reflection binding which flags which indicates what type of method to find.</param>
-        /// <param name="argumentTypes">The argument types of the method signature to find.</param>
-        private ReflectedMethod GetMethodFromHierarchy(Type type, object obj, string name, BindingFlags bindingFlags, Type[] argumentTypes)
-        {
-            bool isStatic = bindingFlags.HasFlag(BindingFlags.Static);
-            MethodInfo method = this.GetCached($"method::{isStatic}::{type.FullName}::{name}({string.Join(",", argumentTypes.Select(p => p.FullName))})", () =>
-            {
-                MethodInfo methodInfo = null;
-                for (; type != null && methodInfo == null; type = type.BaseType)
-                    methodInfo = type.GetMethod(name, bindingFlags, null, argumentTypes, null);
-                return methodInfo;
-            });
-            return method != null
-                ? new ReflectedMethod(type, obj, method, isStatic)
-                : null;
-        }
-
         /// <summary>Get a method or field through the cache.</summary>
         /// <typeparam name="TMemberInfo">The expected <see cref="MemberInfo"/> type.</typeparam>
         /// <param name="key">The cache key.</param>
diff --git a/src/SMAPI/Framework/RequestExitDelegate.cs b/src/SMAPI/Framework/RequestExitDelegate.cs
deleted file mode 100644
index 93ef1cf9..00000000
--- a/src/SMAPI/Framework/RequestExitDelegate.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-#nullable disable
-
-namespace StardewModdingAPI.Framework
-{
-    /// <summary>A delegate which requests that SMAPI immediately exit the game. This should only be invoked when an irrecoverable fatal error happens that risks save corruption or game-breaking bugs.</summary>
-    /// <param name="module">The module which requested an immediate exit.</param>
-    /// <param name="reason">The reason provided for the shutdown.</param>
-    internal delegate void RequestExitDelegate(string module, string reason);
-}
diff --git a/src/SMAPI/Framework/SGame.cs b/src/SMAPI/Framework/SGame.cs
index 4fa7fe7b..0a8a068f 100644
--- a/src/SMAPI/Framework/SGame.cs
+++ b/src/SMAPI/Framework/SGame.cs
@@ -2,7 +2,6 @@ using System;
 using System.Collections.ObjectModel;
 using System.Diagnostics.CodeAnalysis;
 using System.Text;
-using System.Threading.Tasks;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using StardewModdingAPI.Events;
@@ -64,9 +63,6 @@ namespace StardewModdingAPI.Framework
         /// <summary>Manages input visible to the game.</summary>
         public SInputState Input => (SInputState)Game1.input;
 
-        /// <summary>The game background task which initializes a new day.</summary>
-        public Task NewDayTask => Game1._newDayTask;
-
         /// <summary>Monitors the entire game state for changes.</summary>
         public WatcherCore Watchers { get; private set; } = null!; // initialized on first update tick