ci/travis: remove linux builds

.travis.yml

@@ -4,12 +4,6 @@ matrix:
   include:
     - os: freebsd
       compiler: clang
-    - os: linux
-      compiler: gcc
-      env: CONTAINER=registry.cirno.systems/kiwi/containers/mpv-ci:stable-deps CI_SCRIPT=ci/build-tumbleweed.sh
-    - os: linux
-      compiler: clang
-      env: CONTAINER=registry.cirno.systems/kiwi/containers/mpv-ci:stable-deps CI_SCRIPT=ci/build-tumbleweed.sh
   fast_finish: true
 
 dist: focal
@@ -33,7 +27,6 @@ branches:
 before_install:
   - if [ "$TRAVIS_COMPILER" = "clang" ]; then export CXX="clang++"; fi
   - if [ "$TRAVIS_COMPILER" = "gcc" ]; then export CXX="g++"; fi
-  - if [ -n "$CONTAINER" ]; then docker pull $CONTAINER; fi
   - |
         if [ "$TRAVIS_OS_NAME" = "freebsd" ]; then
             # Requested in ci/build-freebsd.sh
@@ -73,14 +66,6 @@ before_install:
 
 script:
   - ./bootstrap.py
-  - |
-        if [ "$TRAVIS_OS_NAME" = "linux" ]; then
-            if [ -n "$CONTAINER" ]; then
-                docker run --env CC --env TARGET -v $TRAVIS_BUILD_DIR:/build $CONTAINER /bin/sh -c "cd /build && $CI_SCRIPT"
-            else
-                $CI_SCRIPT
-            fi
-        fi
   - if [ "$TRAVIS_OS_NAME" = "freebsd" ]; then ./ci/build-freebsd.sh; fi
 after_failure: cat ./build/config.log
 after_script: TOOLS/travis-rebuild-website