ci/travis: remove everything as it's nop now

.travis.yml

@@ -1,52 +0,0 @@
-language: c
-
-matrix:
-  fast_finish: true
-
-dist: focal
-services:
-  - docker
-
-env:
-  global:
-    # Coverity token
-    - secure: "H21mSRlMhk4BKS0xHZvCFGJxteCP0hRVUxTuNfM2Z9HBsyutuLEYMtViLO86VtM+Tqla3xXPzUdS4ozLwI72Ax/5ZUDXACROj73yW6QhFB5D6rLut12+FjqC7M33Qv2hl0xwgNBmR5dsm1ToP37+Wn+ecJQNvN8fkTXF+HVzOEw="
-    # Travis token for mpv.io
-    - secure: "nlTVLJK6kRhtXvhKCoJ3YdFGHuKaq/eHowfPw25hqRWuBOZd+HjHY5KIYjV7SxuKFDpJE4GpNcvA3Q31nsqomxpkLYgrwjg6TSazN7ZP+x85ZgV1QGFebrPfGm2n5UR5CAPAwFoeF3pZheLi4bajVzwq1fWW+x3grS188P9OZso="
-
-branches:
-  only:
-    - master
-    - ci
-    - coverity_scan
-    - /release\/.*$/
-
-before_install:
-  - if [ "$TRAVIS_COMPILER" = "clang" ]; then export CXX="clang++"; fi
-  - if [ "$TRAVIS_COMPILER" = "gcc" ]; then export CXX="g++"; fi
-
-
-
-script:
-  - ./bootstrap.py
-after_failure: cat ./build/config.log
-after_script: TOOLS/travis-rebuild-website
-
-notifications:
-  email: false
-  irc:
-    if: fork = false
-    channels:
-      - "irc.libera.chat#mpv-devel"
-    on_success: change
-    on_failure: always
-
-addons:
-  coverity_scan:
-    project:
-      name: "mpv-player/mpv"
-      description: "Build submitted via Travis CI"
-    notification_email: mpv-team@googlegroups.com
-    build_command_prepend: "./bootstrap.py && ./waf configure"
-    build_command:   "./waf build"
-    branch_pattern: coverity_scan