public function removeRule($field, $rule)
    {
        if (isset($this->rules[$field][$rule])) {
            unset($this->rules[$field][$rule]);
            return true;
        }
        return false;
    }
public function removeRule($field, $rule)
    {
        if (isset($this->rules[$field][$rule])) {
            unset($this->rules[$field][$rule]);
            return true;
        }
        return false;
    }
public function removeRule ( $ field , $ rule ) { if ( isset ( $ this -> rules [ $ field ] [ $ rule ] ) ) { unset ( $ this -> rules [ $ field ] [ $ rule ] ) ; return true ; } return false ; }
Removes the rule in field

@param string $field The name of field
@param string $rule The name of rule
@return bool
Removes the rule in field