Revert "Fixed leak in recorder when adding descriptions (#3487)"

This reverts commit 932b696, since we
actually don't support the description flag in the 0.x recorder.

Author: lminiero

record.c

@@ -77,8 +77,6 @@ static void janus_recorder_free(const janus_refcount *recorder_ref) {
 	recorder->codec = NULL;
 	g_free(recorder->fmtp);
 	recorder->fmtp = NULL;
-	g_free(recorder->description);
-	recorder->description = NULL;
 	if(recorder->extensions != NULL)
 		g_hash_table_destroy(recorder->extensions);
 	janus_mutex_destroy(&recorder->mutex);