Fixed maxLength 0 bug

Author: sorinsarca

src/Keywords/MaxLengthKeyword.php

@@ -43,10 +43,6 @@ public function __construct(int $length)
      */
     public function validate(ValidationContext $context, Schema $schema): ?ValidationError
     {
-        if ($this->length === 0) {
-            return null;
-        }
-
         $length = $context->getStringLength();
 
         if ($length <= $this->length) {