Revert "Fix memory leaks"

This reverts commit 12586d1c216c52efbfd2265d240147b1c31fe543.

Change-Id: I3cdb236b5578695d4b0ee6ba2478326e630362d9
(cherry picked from commit a667247278c732c5317a8fce670c50d42e4a4db0)
diff --git a/media/libstagefright/MPEG4Extractor.cpp b/media/libstagefright/MPEG4Extractor.cpp
index 9c096e6..1a1563a 100644
--- a/media/libstagefright/MPEG4Extractor.cpp
+++ b/media/libstagefright/MPEG4Extractor.cpp
@@ -4624,8 +4624,6 @@
         }
         if (size > mBuffer->size()) {
             ALOGE("buffer too small: %zu > %zu", size, mBuffer->size());
-            mBuffer->release();
-            mBuffer = NULL;
             return ERROR_BUFFER_TOO_SMALL;
         }
     }
@@ -4918,8 +4916,6 @@
         }
         if (size > mBuffer->size()) {
             ALOGE("buffer too small: %zu > %zu", size, mBuffer->size());
-            mBuffer->release();
-            mBuffer = NULL;
             return ERROR_BUFFER_TOO_SMALL;
         }
     }