Revert of Move FilePlayer and FileRecorder to Voice Engine

webrtc/voice_engine/voice_engine_unittests.isolate

Index: webrtc/voice_engine/voice_engine_unittests.isolate
diff --git a/webrtc/voice_engine/voice_engine_unittests.isolate b/webrtc/voice_engine/voice_engine_unittests.isolate
index 5541c4af07477062712ac67225fd5d547f703485..0d55515f997341cce81efb40e8d094c05c92df1c 100644
--- a/webrtc/voice_engine/voice_engine_unittests.isolate
+++ b/webrtc/voice_engine/voice_engine_unittests.isolate
@@ -19,13 +19,5 @@
         ],
       },
     }],
-    ['OS=="linux" or OS=="mac" or OS=="win" or OS=="android"', {
-      'variables': {
-        'files': [
-          '<(DEPTH)/resources/utility/encapsulated_pcm16b_8khz.wav',
-          '<(DEPTH)/resources/utility/encapsulated_pcmu_8khz.wav',
-        ],
-      },
-    }],
   ],
 }