Go through normal where logic in destroy

Building the Arel AST, and manipulating the relation manually like this
is prone to errors and breakage as implementation details change from
underneath it.

activerecord/lib/active_record/persistence.rb

@@ -495,15 +495,7 @@ def destroy_row
     end
 
     def relation_for_destroy
-      pk         = self.class.primary_key
-      column     = self.class.columns_hash[pk]
-      substitute = self.class.connection.substitute_at(column)
-
-      relation = self.class.unscoped.where(
-        self.class.arel_table[pk].eq(substitute))
-
-      relation.bind_values = [[column, id]]
-      relation
+      self.class.unscoped.where(self.class.primary_key => id)
     end
 
     def create_or_update(*args)