public function delete()
    {
        if (file_exists($this->filename)) {
            unlink($this->filename);
        }
        $this->hit = false;
        $this->value = null;
        return $this;
    }
public function delete()
    {
        if (file_exists($this->filename)) {
            unlink($this->filename);
        }
        $this->hit = false;
        $this->value = null;
        return $this;
    }
public function delete ( ) { if ( file_exists ( $ this -> filename ) ) { unlink ( $ this -> filename ) ; } $ this -> hit = false ; $ this -> value = null ; return $ this ; }
Removes the current key from the cache.

@return \Psr\Cache\ItemInterface
The current item.
Removes the current key from the cache .