Fix Regex/Array Rules normalisation

Author: jelaucv

src/Kris/LaravelFormBuilder/Fields/FormField.php

@@ -379,12 +379,7 @@ protected function normalizeRules($rules)
         }
 
         if (is_array($rules)) {
-            $normalizedRules = [];
-            foreach ($rules as $rule) {
-                $normalizedRules[] = $this->normalizeRules($rule);
-            }
-
-            return array_values(array_unique(Arr::flatten($normalizedRules), SORT_REGULAR));
+            return array_values(array_unique(Arr::flatten($rules), SORT_REGULAR));
         }
 
         return $rules;