remove unused file

response_entity.go

@@ -1,20 +0,0 @@
-package main
-
-type status struct {
-	code       string
-	message    string
-	created_at string
-}
-
-type domain struct {
-	id      int
-	name    string
-	status  string
-	records string
-	owner   string
-}
-
-type domain_list struct {
-	ret_status status
-	domains    []domain
-}