Remove assignment for function with no return

Signed-off-by: Ivan Kanakarakis <[email protected]>

Author: c00kiemon5ter

src/saml2/mongo_store.py

@@ -321,7 +321,7 @@ def __getitem__(self, key):
             raise CorruptDatabase("Found more than one EPTID document")
 
     def __setitem__(self, key, value):
-        _ = self.mdb.store(key, **{"eptid": value})
+        self.mdb.store(key, **{"eptid": value})
 
 
 #------------------------------------------------------------------------------