Work around issue with -r in presubmit scripts.

For some reason, when a `CheckSorted` presubmit invokes
`verify_sorted_test.dart`, the `-r` flag is preventing the compiler
from picking up the proper language version from
`.dart_tool/package_config.json`. This is interfering with my ability
to run presubmits for
https://dart-review.googlesource.com/c/sdk/+/505046.

See https://github.com/dart-lang/sdk/issues/63464 for additional
details.

As a temporary workaround, this CL removes the `-r` flag. It should be
reverted once https://github.com/dart-lang/sdk/issues/63464 has been
fixed (and the pre-built SDK has been updated to include the fix).

Change-Id: Ibc48eec4ef382d6afe17d73454f07dcd6a6a6964
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/506700
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>

pkg/analysis_server/PRESUBMIT.py

@@ -44,7 +44,6 @@ def CheckSorted(input_api, output_api):
     result = subprocess.run([
         dart,
         'run',
-        '-r',
         os.path.join(local_root, 'pkg', 'analysis_server', 'test',
                      'verify_sorted_test.dart'),
     ] + sourceArgs,

pkg/analyzer_cli/PRESUBMIT.py

@@ -44,7 +44,6 @@ def CheckSorted(input_api, output_api):
     result = subprocess.run([
         dart,
         'run',
-        '-r',
         os.path.join(local_root, 'pkg', 'analysis_server', 'test',
                      'verify_sorted_test.dart'),
     ] + sourceArgs,

pkg/analyzer_plugin/PRESUBMIT.py

@@ -44,7 +44,6 @@ def CheckSorted(input_api, output_api):
     result = subprocess.run([
         dart,
         'run',
-        '-r',
         os.path.join(local_root, 'pkg', 'analysis_server', 'test',
                      'verify_sorted_test.dart'),
     ] + sourceArgs,

pkg/linter/PRESUBMIT.py

@@ -44,7 +44,6 @@ def CheckSorted(input_api, output_api):
     result = subprocess.run([
         dart,
         'run',
-        '-r',
         os.path.join(local_root, 'pkg', 'analysis_server', 'test',
                      'verify_sorted_test.dart'),
     ] + sourceArgs,