get rid of no longer used methods in Zope 3.2

lib/python/ZPublisher/HTTPRequest.py

@@ -1339,16 +1339,6 @@ class HTTPRequest(BaseRequest):
     def taintWrapper(self, enabled=TAINTING_ENABLED):
         return enabled and TaintRequestWrapper(self) or self
 
-    # Used by Five
-
-    def getPresentationSkin(self):
-        """see zope.component.interfaces.IPresentationRequest"""
-        return getattr(self, '_presentation_skin', None)
-
-    def setPresentationSkin(self, skin):
-        """see zope.publisher.interfaces.IPublicationRequest"""
-        self._presentation_skin = skin
-
     def getURL(self):
         return self.URL