--- a/hgext3rd/evolve/exthelper.py	Mon Nov 19 01:49:34 2018 +0000
+++ b/hgext3rd/evolve/exthelper.py	Sat Nov 10 23:54:46 2018 -0500
@@ -4,20 +4,13 @@
 
 from mercurial import (
     commands,
+    configitems,
     extensions,
     registrar,
     revset,
     templatekw,
-    util,
 )
 
-configitem = None
-dynamicdefault = None
-if util.safehasattr(registrar, 'configitem'):
-    configitem = registrar.configitem
-    from mercurial import configitems
-    dynamicdefault = configitems.dynamicdefault
-
 class exthelper(object):
     """Helper for modular extension setup
 
@@ -49,20 +42,12 @@
             self.command._doregister = _newdoregister
 
         self.configtable = {}
-        self._configitem = None
-        if configitem is not None:
-            self._configitem = configitem(self.configtable)
-
-    def configitem(self, section, config):
-        """For Mercurial 4.4 and above, register a config item
+        self._configitem = registrar.configitem(self.configtable)
 
-        For now constraint to 'dynamicdefault' until we only support version with the feature.
-        Older version would otherwise not use the declare default.
-
-        For older version no-op fallback for old Mercurial versions
+    def configitem(self, section, config, default=configitems.dynamicdefault):
+        """Register a config item.
         """
-        if self._configitem is not None:
-            self._configitem(section, config, default=dynamicdefault)
+        self._configitem(section, config, default=default)
 
     def merge(self, other):
         self._uicallables.extend(other._uicallables)