Get rid of unused assignments and apparently unused default arguments.

src/ZODB/tests/BasicStorage.py

@@ -85,9 +85,10 @@ class BasicStorage:
         eq(value, MinPO(11))
         eq(revid, newrevid)
 
-    def checkNonVersionStore(self, oid=None, revid=None, version=None):
+##    def checkNonVersionStore(self, oid=None, revid=None, version=None):
+    def checkNonVersionStore(self):
         revid = ZERO
-        newrevid = self._dostore(revid=revid)
+        newrevid = self._dostore(revid=None)
         # Finish the transaction.
         self.assertNotEqual(newrevid, revid)
 

src/ZODB/tests/StorageTestBase.py

@@ -78,10 +78,8 @@ def zodb_unpickle(data):
     if isinstance(klass_info, types.TupleType):
         if isinstance(klass_info[0], types.TupleType):
             modname, klassname = klass_info[0]
-            args = klass_info[1]
         else:
             modname, klassname = klass_info
-            args = None
         if modname == "__main__":
             ns = globals()
         else: