remove upgrade step from here. all upgrade step of plone goes to plone.app.upgrades

plone/app/discussion/profiles/default/metadata.xml

@@ -1,5 +1,5 @@
 <metadata>
- <version>110</version>
+ <version>100</version>
  <dependencies>
   <dependency>profile-plone.app.registry:default</dependency>
  </dependencies>

plone/app/discussion/upgrades.py

@@ -7,9 +7,3 @@ def update_registry(context):
     registry = getUtility(IRegistry)
     registry.registerInterface(IDiscussionSettings)
 
-
-def add_anonymous_email_enabled_settings(context):
-    registry = getUtility(IRegistry)
-    key = 'plone.app.discussion.interfaces.IDiscussionSettings.'
-    key += 'anonymous_email_enabled'
-    registry[key] = False

plone/app/discussion/upgrades.zcml

@@ -11,12 +11,4 @@
       handler=".upgrades.update_registry"
       />
 
-  <genericsetup:upgradeStep
-      source="*"
-      destination="110"
-      title="Update plone.app.discussion setting registry"
-      description=""
-      profile="plone.app.discussion:default"
-      handler=".upgrades.update_registry"
-      />
 </configure>