Remove explicit calls to parse_query.

Now that all query classifier functions parse the query if it
has not been parsed, there is no reason for any module to call
parse_query explicitly.

server/modules/routing/schemarouter/shardrouter.c

@@ -447,11 +447,6 @@ get_shard_target_name(ROUTER_INSTANCE* router, ROUTER_CLIENT_SES* client, GWBUF*
     char *query = NULL,*tmp = NULL;
     bool has_dbs = false; /**If the query targets any database other than the current one*/
 
-    if(!query_is_parsed(buffer))
-    {
-        parse_query(buffer);
-    }
-
     dbnms = skygw_get_database_names(buffer, &sz);
 
     if(sz > 0)