avcodec/vp8_parser: Remove redundant output initialization

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/vp8_parser.c

@@ -70,8 +70,6 @@ static int parse(AVCodecParserContext *s,
         s->coded_height = FFALIGN(height, 16);
     }
 
-    *poutbuf      = buf;
-    *poutbuf_size = buf_size;
     return buf_size;
 }