Remove skipIfRocm from test_fileobj_flac in soundfile.save_test (#1626)

The test was broken from the beginning and for a reason unrelated to
ROCm, but was disabled for ROCm in https://github.com/pytorch/audio/pull/1411.
https://github.com/pytorch/audio/pull/1604 fixed the test so that we are re-enabling it.

test/torchaudio_unittest/backend/soundfile/save_test.py

@@ -11,7 +11,6 @@ from torchaudio_unittest.common_utils import (
     get_wav_data,
     load_wav,
     nested_params,
-    skipIfRocm,
 )
 from .common import (
     fetch_wav_subtype,
@@ -281,7 +280,6 @@ class TestFileObject(TempDirMixin, PytorchTestCase):
         self._test_fileobj('wav')
 
     @skipIfFormatNotSupported("FLAC")
-    @skipIfRocm
     def test_fileobj_flac(self):
         """Saving audio via file-like object works"""
         self._test_fileobj('flac')