remove count var

this change was unneccsary as nothing was gained from it

activerecord/lib/active_record/associations/has_many_association.rb

@@ -121,13 +121,11 @@ def delete_or_nullify_all_records(method)
         # Deletes the records according to the <tt>:dependent</tt> option.
         def delete_records(records, method)
           if method == :destroy
-            count = records.length
             records.each(&:destroy!)
-            update_counter(-count) unless inverse_updates_counter_cache?
+            update_counter(-records.length) unless inverse_updates_counter_cache?
           else
             scope = self.scope.where(reflection.klass.primary_key => records)
-            count = delete_count(method, scope)
-            update_counter(-count)
+            update_counter(-delete_count(method, scope))
           end
         end