Revert of Define AudioBuffer and VideoFrame for mojo

media/base/sample_format.h

Index: media/base/sample_format.h
diff --git a/media/base/sample_format.h b/media/base/sample_format.h
index 0260f169a03595b0754ca5e229b172cc53f1d049..7a488433ab8925726b3a6a15cad85b1cb788e6ee 100644
--- a/media/base/sample_format.h
+++ b/media/base/sample_format.h
@@ -34,12 +34,6 @@
 // Returns the name of the sample format as a string
 MEDIA_EXPORT const char* SampleFormatToString(SampleFormat sample_format);
 
-// Returns true if |sample_format| is planar, false otherwise.
-MEDIA_EXPORT bool IsPlanar(SampleFormat sample_format);
-
-// Returns true if |sample_format| is interleaved, false otherwise.
-MEDIA_EXPORT bool IsInterleaved(SampleFormat sample_format);
-
 }  // namespace media
 
 #endif  // MEDIA_BASE_SAMPLE_FORMAT_H