Revert "[8.x] Fix formatWheres in DatabaseRule (#36441)" (#36452)

This reverts commit e3f48f7.

Author: taylorotwell

src/Illuminate/Validation/Rules/DatabaseRule.php

@@ -196,11 +196,7 @@ public function queryCallbacks()
     protected function formatWheres()
     {
         return collect($this->wheres)->map(function ($where) {
-            if (is_bool($where['value'])) {
-                return $where['column'].','.($where['value'] ? 'true' : 'false');
-            } else {
-                return $where['column'].','.'"'.str_replace('"', '""', $where['value']).'"';
-            }
+            return $where['column'].','.'"'.str_replace('"', '""', $where['value']).'"';
         })->implode(',');
     }
 }