made deleted into an effective routine

examples/restbucksCRUD/src/resource/order_handler.e

@@ -297,14 +297,6 @@ feature -- DELETE
 			end
 		end
 
-	deleted (req: WSF_REQUEST): BOOLEAN
-			-- Has resource named by `req' been deleted?
-		do
-			if not req.error_handler.has_error then
-				Result := True
-			end
-		end
-
 	delete_queued (req: WSF_REQUEST): BOOLEAN
 			-- Has resource named by `req' been queued for deletion?
 		do

library/server/wsf/router/wsf_skeleton_handler.e

@@ -197,7 +197,12 @@ feature -- DELETE
 			-- Has resource named by `req' been deleted?
 		require
 			req_attached: req /= Void
-		deferred
+		do
+			if not req.error_handler.has_error then
+				Result := True
+			end
+		ensure
+			negative_implication: not Result implies req.error_handler.has_error
 		end
 
 	delete_queued (req: WSF_REQUEST): BOOLEAN