histedit: drop the 'nodetoverify' method

That method is just returning self.node and is never overridden. We just use
the attribute directly instead and get rid of the method.

This is the beginning of series to simplify and unify verification of constraints
for actions.

hgext/histedit.py

@@ -439,14 +439,6 b' class histeditaction(object):'
         """
         return set([_constraints.noduplicates, _constraints.noother])
 
-    def nodetoverify(self):
-        """Returns a node associated with the action that will be used for
-        verification purposes.
-
-        If the action doesn't correspond to node it should return None
-        """
-        return self.node
-
     def run(self):
         """Runs the action. The default behavior is simply apply the action's
         rulectx onto the current parentctx."""
@@ -1199,8 +1191,8 b' def _edithisteditplan(ui, repo, state, r'
     else:
         rules = _readfile(rules)
     actions = parserules(rules, state)
-    ctxs = [repo[act.nodetoverify()] \
-            for act in state.actions if act.nodetoverify()]
+    ctxs = [repo[act.node] \
+            for act in state.actions if act.node]
     warnverifyactions(ui, repo, actions, state, ctxs)
     state.actions = actions
     state.write()
@@ -1397,7 +1389,7 b' def verifyactions(actions, state, ctxs):'
                 raise error.ParseError(_('unknown constraint "%s"') %
                         constraint)
 
-        nodetoverify = action.nodetoverify()
+        nodetoverify = action.node
         if nodetoverify is not None:
             ha = node.hex(nodetoverify)
             if _constraints.noother in constraints and ha not in expected:
@@ -1597,8 +1589,8 b' def stripwrapper(orig, ui, repo, nodelis'
     if os.path.exists(os.path.join(repo.path, 'histedit-state')):
         state = histeditstate(repo)
         state.read()
-        histedit_nodes = set([action.nodetoverify() for action
-                             in state.actions if action.nodetoverify()])
+        histedit_nodes = set([action.node for action
+                             in state.actions if action.node])
         strip_nodes = set([repo[n].node() for n in nodelist])
         common_nodes = histedit_nodes & strip_nodes
         if common_nodes: