remove unused function

proxy/errors.generated.go

@@ -1,5 +0,0 @@
-package proxy
-
-import "v2ray.com/core/common/errors"
-
-func newError(values ...interface{}) *errors.Error { return errors.New(values...).Path("Proxy") }

proxy/proxy.go

@@ -5,8 +5,6 @@
 // 2. Register a config creator through common.RegisterConfig.
 package proxy
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg proxy -path Proxy
-
 import (
 	"context"