remove unneeded compile switch (#767)

This was originally added to reduce antivirus false positives, but they do it anyway at this point.

docs/release-notes.md

@@ -12,6 +12,7 @@
   * On macOS, the `StardewModdingAPI.bin.osx` file is no longer overwritten if it's identical to avoid resetting file permissions (thanks to 007wayne!).
   * Fixed error for non-English players after returning to title, reloading, and entering town with a completed movie theater.
   * Fixed `world_clear` console command not removing resource clumps outside the farm and secret woods.
+  * Internal changes to prepare for unofficial 64-bit.
 
 * For modders:
   * Added asset propagation for `Data\Concessions`.

src/SMAPI.Installer/InteractiveInstaller.cs

@@ -10,9 +10,7 @@ using StardewModdingAPI.Internal.ConsoleWriting;
 using StardewModdingAPI.Toolkit;
 using StardewModdingAPI.Toolkit.Framework.ModScanning;
 using StardewModdingAPI.Toolkit.Utilities;
-#if !SMAPI_FOR_WINDOWS
 using System.Diagnostics;
-#endif
 
 namespace StardewModdingApi.Installer
 {
@@ -433,8 +431,6 @@ namespace StardewModdingApi.Installer
 
                         // mark file executable
                         // (MSBuild doesn't keep permission flags for files zipped in a build task.)
-                        // (Note: exclude from Windows build because antivirus apps can flag the process start code as suspicious.)
-#if !SMAPI_FOR_WINDOWS
                         new Process
                         {
                             StartInfo = new ProcessStartInfo
@@ -444,7 +440,6 @@ namespace StardewModdingApi.Installer
                                 CreateNoWindow = true
                             }
                         }.Start();
-#endif
                     }
 
                     // create mods directory (if needed)