Revert "stagefright: define CB_CODEC_RELEASED and ReleaseReason enum."

This reverts commit ea20d117ef9b4e867ec3982c7d070e719617ba2f.

Change-Id: Ia77448a81429814e6915eca9c1cd854ca0e623cc
diff --git a/include/media/stagefright/MediaCodec.h b/include/media/stagefright/MediaCodec.h
index 4ddb8d4..d055341 100644
--- a/include/media/stagefright/MediaCodec.h
+++ b/include/media/stagefright/MediaCodec.h
@@ -51,13 +51,7 @@
         CB_OUTPUT_AVAILABLE = 2,
         CB_ERROR = 3,
         CB_OUTPUT_FORMAT_CHANGED = 4,
-        CB_CODEC_RELEASED = 5,
-    };
-
-    // used by CB_CODEC_RELEASED to tell the upper layer the cause of the release.
-    enum ReleaseReason {
-        REASON_UNKNOWN = 0,
-        REASON_RECLAIMED,  // resources reclaimed by resource manager
+        CB_RESOURCE_RECLAIMED = 5,
     };
 
     struct BatteryNotifier;