remove the web integration test (flutter#21564)

* remove the web integration test

* add -rf and copy even if the directory does not exists

* try creating the directory

* Update .cirrus.yml

still getting error creating the directory. use -p option

.cirrus.yml

@@ -65,21 +65,13 @@ task:
         mkdir -p $FRAMEWORK_PATH
         cd $FRAMEWORK_PATH
         git clone https://github.com/flutter/flutter.git
-      test_web_script: |
-        cd $FRAMEWORK_PATH/flutter/dev/integration_tests/web
-        ../../../bin/flutter config --local-engine=host_debug_unopt --no-analytics --enable-web
-        ../../../bin/flutter --local-engine=host_debug_unopt build web -v
       analyze_framework_script: |
         cd $FRAMEWORK_PATH/flutter
         rm -rf bin/cache/pkg/sky_engine
+        mkdir -p bin/cache/pkg/
         cp -r $ENGINE_PATH/src/out/host_debug_unopt/gen/dart-pkg/sky_engine bin/cache/pkg/
         bin/flutter update-packages --local-engine=host_debug_unopt
         bin/flutter analyze --dartdocs --flutter-repo --local-engine=host_debug_unopt
       test_framework_script: |
         cd $FRAMEWORK_PATH/flutter/packages/flutter
         ../../bin/flutter test --local-engine=host_debug_unopt
-
-    - name: build_test
-      build_script: |
-        cd $ENGINE_PATH/src/flutter
-        ./ci/build.sh