ServerRequest::withoutAttribute( $attribute ): static

154    public function withoutAttribute($attribute): ServerRequestInterface155    {156        if (!\is_string($attribute)) {157            throw new \InvalidArgumentException('Attribute name must be a string');158        }159        if (\false === \array_key_exists($attribute, $this->attributes)) {160            return $this;161        }162        $new = clone $this;163        unset($new->attributes[$attribute]);164        return $new;165    }