lib/Github/Api/Issue/Milestones.php
public function remove($username, $repository, $id)
    {
        return $this->delete('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/milestones/'.rawurlencode($id));
    }
public function remove($username, $repository, $id)
    {
        return $this->delete('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/milestones/'.rawurlencode($id));
    }
public function remove ( $ username , $ repository , $ id ) { return $ this -> delete ( '/repos/' . rawurlencode ( $ username ) . '/' . rawurlencode ( $ repository ) . '/milestones/' . rawurlencode ( $ id ) ) ; }
Delete a milestone for a repository.

@link https://developer.github.com/v3/issues/milestones/#delete-a-milestone

@param string $username
@param string $repository
@param int    $id

@return array|string
Delete a milestone for a repository .