Update comments

We no longer put the filename at start of file.

Change-Id: Ic435b159a23105681e3d4a6cb1ac097bc853302e
diff --git a/media/libmedia/ToneGenerator.cpp b/media/libmedia/ToneGenerator.cpp
index 6cb10aa..54eb98a 100644
--- a/media/libmedia/ToneGenerator.cpp
+++ b/media/libmedia/ToneGenerator.cpp
@@ -791,7 +791,7 @@
 //        generators, instantiates output audio track.
 //
 //    Input:
-//        streamType:        Type of stream used for tone playback (enum AudioTrack::stream_type)
+//        streamType:        Type of stream used for tone playback
 //        volume:            volume applied to tone (0.0 to 1.0)
 //
 //    Output: