RSS: remove no-op

"end" label is only reached if psz_eltname is NULL.

modules/video_filter/rss.c

@@ -875,7 +875,6 @@ static bool ParseFeed( filter_t *p_filter, xml_reader_t *p_xml_reader,
     return true;
 
 end:
-    free( psz_eltname );
     return false;
 }