Revert "Remove FailedResourceType and return custom error"

plugin/pkg/scheduler/algorithm/predicates/error.go

@@ -1,40 +0,0 @@
-/*
-Copyright 2016 The Kubernetes Authors All rights reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package predicates
-
-import "fmt"
-
-var (
-	ErrExceededMaxPodNumber   = newInsufficientResourceError("PodCount")
-	ErrInsufficientFreeCPU    = newInsufficientResourceError("CPU")
-	ErrInsufficientFreeMemory = newInsufficientResourceError("Memory")
-)
-
-// InsufficientResourceError is an error type that indicates what kind of resource limit is
-// hit and caused the unfitting failure.
-type InsufficientResourceError struct {
-	// ResourceName tells the name of the resource that is insufficient
-	ResourceName string
-}
-
-func newInsufficientResourceError(resourceName string) *InsufficientResourceError {
-	return &InsufficientResourceError{resourceName}
-}
-
-func (e *InsufficientResourceError) Error() string {
-	return fmt.Sprintf("Node didn't have enough resource: %s", e.ResourceName)
-}