Remove client_slash file

Author: all-seeing-code

pydgraph/__init__.py

@@ -16,6 +16,5 @@
     Check, Version, NQuad, Value, Facet, Latency
 from pydgraph.client_stub import *
 from pydgraph.client import *
-from pydgraph.client_slash import *
 from pydgraph.txn import *
 from pydgraph.errors import *