remove unused code

Change-Id: If821920ec8872e326b7d85437ad8d2620807799d

test/integration/master/transformation_testcase.go

@@ -258,12 +258,3 @@ func (e *transformTest) printMetrics() error {
 
 	return nil
 }
-
-func contains(s []string, e string) bool {
-	for _, a := range s {
-		if a == e {
-			return true
-		}
-	}
-	return false
-}