Cleanup dart_runner examples & tests. (flutter#22769)

Author: chandarrengoog

ci/licenses_golden/licenses_flutter

@@ -1158,24 +1158,6 @@ FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/embedder/shim.dart
 FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/embedder/snapshot.cc.tmpl
 FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/embedder/snapshot.dart
 FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/embedder/snapshot.h
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/goodbye_dart/goodbye_dart.dart
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/goodbye_dart/goodbye_dart_test
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/goodbye_dart/meta/goodbye_dart_aot.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/goodbye_dart/meta/goodbye_dart_jit.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/greeting/greeting.dart
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_app_dart/interfaces/hello.fidl
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_app_dart/main.dart
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_app_dart/meta/hello_app_dart_aot.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_app_dart/meta/hello_app_dart_jit.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_dart/bin/hello_dart.dart
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_dart/meta/hello_dart_aot.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_dart/meta/hello_dart_aot_product.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_dart/meta/hello_dart_debug.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_dart/meta/hello_dart_jit.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/examples/hello_dart/meta/hello_dart_jit_product.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/integration/main.dart
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/integration/meta/dart_aot_runner_test.cmx
-FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/integration/meta/dart_jit_runner_test.cmx
 FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/kernel/libraries.json
 FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/logging.h
 FILE: ../../../flutter/shell/platform/fuchsia/dart_runner/main.cc