replace for a,b in x.items() with for a in x.keys()

where the value from items is not used.

Recommended refactor from Tom Ekberg after seeing flake8 fixes for
unused loop variables.

Author: rouilj

roundup/backends/back_anydbm.py

@@ -583,7 +583,7 @@ def fix_journal(self, classname, journal):
             return journal
         for j in journal:
             if j[3] == 'set':
-                for k, _v in j[4].items():
+                for k in j[4].keys():
                     if k in pwprops and j[4][k]:
                         j[4][k] = password.JournalPassword(j[4][k])
         return journal

roundup/backends/rdbms_common.py

@@ -342,7 +342,7 @@ def post_init(self):
                 tables[classname] = spec.schema()
                 save = 1
 
-        for classname, _spec in list(tables.items()):
+        for classname in list(tables.keys()):
             if classname not in self.classes:
                 self.drop_class(classname, tables[classname])
                 del tables[classname]
@@ -2338,7 +2338,7 @@ def find(self, **propspec):
 
         # validate the args
         props = self.getprops()
-        for propname, _nodeids in propspec.items():
+        for propname in propspec.keys():
             # check the prop is OK
             prop = props[propname]
             if not isinstance(prop, Link) and not isinstance(prop, Multilink):