Remove unused variables

pkg/controller/postgresql_test.go

@@ -19,12 +19,6 @@ import (
 var (
 	True  = true
 	False = false
-	logger = logrus.New().WithField("test", "cluster")
-)
-
-const (
-	superUserName       = "postgres"
-	replicationUserName = "standby"
 )
 
 var mockTeamsAPI mockTeamsAPIClient