DEV: Remove .travis.yml config

We're no longer use Travis in core.

.travis.yml

@@ -1,86 +0,0 @@
-language: ruby
-
-git:
-  depth: false
-
-branches:
-  only:
-    - master
-    - beta
-    - stable
-
-env:
-  global:
-    - TRAVIS_NODE_VERSION="10"
-    - DISCOURSE_HOSTNAME=www.example.com
-    - RUBY_GLOBAL_METHOD_CACHE_SIZE=131072
-  matrix:
-    - "RAILS_MASTER=0 QUNIT_RUN=0 RUN_LINT=0"
-    - "RAILS_MASTER=0 QUNIT_RUN=1 RUN_LINT=0"
-    - "RAILS_MASTER=0 QUNIT_RUN=0 RUN_LINT=1"
-
-addons:
-  chrome: stable
-  postgresql: "9.6"
-  apt:
-    update: true
-    packages:
-    - gifsicle
-    - jpegoptim
-    - optipng
-    - jhead
-
-matrix:
-  fast_finish: true
-
-rvm:
-  - 2.6.3
-
-services:
-  - redis-server
-
-sudo: required
-dist: xenial
-
-cache:
-  yarn: true
-  directories:
-    - vendor/bundle
-
-before_install:
-  - wget -qO- https://raw.githubusercontent.com/discourse/discourse_docker/master/image/base/install-pngquant | sudo sh
-  - nvm install node
-  - node --version
-  - gem install bundler -v 1.17.3
-  - git clone --depth=1 https://github.com/discourse/discourse-backup-uploads-to-s3.git plugins/discourse-backup-uploads-to-s3
-  - git clone --depth=1 https://github.com/discourse/discourse-spoiler-alert.git plugins/discourse-spoiler-alert
-  - git clone --depth=1 https://github.com/discourse/discourse-cakeday.git plugins/discourse-cakeday
-  - git clone --depth=1 https://github.com/discourse/discourse-canned-replies.git plugins/discourse-canned-replies
-  - git clone --depth=1 https://github.com/discourse/discourse-chat-integration.git plugins/discourse-chat-integration
-  - git clone --depth=1 https://github.com/discourse/discourse-assign.git plugins/discourse-assign
-  - git clone --depth=1 https://github.com/discourse/discourse-patreon.git plugins/discourse-patreon
-  - git clone --depth=1 https://github.com/discourse/discourse-user-notes.git plugins/discourse-user-notes
-  - git clone --depth=1 https://github.com/discourse/discourse-group-tracker
-  - export PATH=$HOME/.yarn/bin:$PATH
-
-install:
-  - bash -c "if [ '$RAILS_MASTER' == '1' ]; then bundle update --retry=3 --jobs=3 arel rails seed-fu; fi"
-  - bash -c "if [ '$RAILS_MASTER' == '0' ]; then bundle install --without development --deployment --retry=3 --jobs=3; fi"
-  - bash -c "if [ '$QUNIT_RUN' == '1' ] || [ '$RUN_LINT' == '1' ]; then yarn install --dev; fi"
-  - bash -c "if [ '$RUN_LINT' != '1' ]; then bundle exec rake db:create && LOAD_PLUGINS=1 bundle exec rake db:migrate; fi"
-
-script:
-  - |
-    bash -c "
-      if [ '$RUN_LINT' == '1' ]; then
-        npx lefthook run lints
-      else
-        if [ '$QUNIT_RUN' == '1' ]; then
-          bundle exec rake qunit:test['1200000'] && \
-          bundle exec rake qunit:test['1200000','/wizard/qunit'] && \
-          bundle exec rake plugin:qunit
-        else
-          bundle exec rspec && bundle exec rake plugin:spec
-        fi
-      fi
-    "