Storage/src/StreamWrapper.php
public function unlink($path)
    {
        $client = $this->openPath($path);
        $object = $this->bucket->object($this->file);

        try {
            $object->delete();
            return true;
        } catch (ServiceException $e) {
            return false;
        }
    }
public function unlink($path)
    {
        $client = $this->openPath($path);
        $object = $this->bucket->object($this->file);

        try {
            $object->delete();
            return true;
        } catch (ServiceException $e) {
            return false;
        }
    }
public function unlink ( $ path ) { $ client = $ this -> openPath ( $ path ) ; $ object = $ this -> bucket -> object ( $ this -> file ) ; try { $ object -> delete ( ) ; return true ; } catch ( ServiceException $ e ) { return false ; } }
Callback handler for deleting a file

@param string $path The URL of the file to delete
@return bool
Callback handler for deleting a file