[Fuchsia] Remove product.experimental

The SDK version is way ahead of https://fxrev.dev/841540 and the config
is not necessary anymore.

https://github.com/dart-lang/sdk/issues/38752
Change-Id: Ic8de02bdbb7b2c88ce742d39bce686c00fd97d8e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/344440
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Zijie He <zijiehe@google.com>

build/fuchsia/with_envs.py

@@ -43,12 +43,6 @@ def Main():
     os.environ['FUCHSIA_SDK_ROOT'] = os.path.join(os.environ['SRC_ROOT'],
                                                   'third_party', 'fuchsia',
                                                   'sdk', sdk_dir)
-    # TODO(zijiehe): Remove this experimental config after upgrading sdk to a
-    # version later than https://fxrev.dev/841540.
-    subprocess.call([
-        os.path.join(os.environ['FUCHSIA_SDK_ROOT'], 'tools', 'x64', 'ffx'),
-        'config', 'set', 'product.experimental', 'true'
-    ])
 
     with subprocess.Popen(sys.argv[1:]) as proc:
         try: