Removes QL fix to put into other PR

Author: ilumsden

hatchet/query/engine.py

@@ -84,8 +84,7 @@ def _cache_node(self, node, query, dframe):
             row = None
             begin_code_region("get_perf_data_for_node")
             if isinstance(dframe.index, pd.MultiIndex):
-                row = dframe.xs(node, level="node", drop_level=False)
-                # row = pd.concat([dframe.loc[node]], keys=[node], names=["node"])
+                row = pd.concat([dframe.loc[node]], keys=[node], names=["node"])
             else:
                 row = dframe.loc[node]
             end_code_region("get_perf_data_for_node")