chore(utils): remove dead code EE-4846 (#8253)

api/internal/utils/utils.go

@@ -1,11 +0,0 @@
-package utils
-
-// Contains returns true if the given int is contained in the given slice of int.
-func Contains(s []int, e int) bool {
-	for _, a := range s {
-		if a == e {
-			return true
-		}
-	}
-	return false
-}