CI: Remove Travis CI

All our CI needs are handled by GitHub Actions

.travis.yml

@@ -1,57 +0,0 @@
-language: cpp
-sudo: required
-dist: bionic
-git:
-  depth: 9999999
-notifications:
-  irc: chat.freenode.net#zoneminder-dev
-branches:
-  except:
-  - modern
-cache: ccache
-addons:
-  ssh_known_hosts: zmrepo.zoneminder.com
-  apt:
-    sources:
-    - sourceline: ppa:iconnor/zoneminder-master
-    - key_url: http://keyserver.ubuntu.com:11371/pks/lookup?op=get&search=0x4D0BF748776FFB04
-    packages:
-    - gdebi
-    - yum-utils
-    - patch
-    - git
-    - curl
-    - sshfs
-    - sed
-    - binfmt-support
-    - qemu
-    - qemu-user-static
-    - dnsutils
-    - traceroute
-install:
-  - update-binfmts --enable qemu-arm
-
-env:
-  - SMPFLAGS=-j4 OS=ubuntu DIST=bionic DOCKER_REPO=iconzm/packpack
-
-compiler:
-- gcc
-services:
-- mysql
-- docker
-
-script:
-- utils/packpack/startpackpack.sh
-
-before_deploy:
-- openssl aes-256-cbc -K $encrypted_62a62750aa73_key -iv $encrypted_62a62750aa73_iv -in ./utils/packpack/deploy_rsa.enc -out /tmp/deploy_rsa -d
-- eval "$(ssh-agent -s)"
-- chmod 600 /tmp/deploy_rsa
-- ssh-add /tmp/deploy_rsa
-
-deploy:
-  provider: script
-  skip_cleanup: true
-  script: utils/packpack/rsync_xfer.sh
-  on:
-    branch: master