lib/Github/Api/Repository/Protection.php
public function remove($username, $repository, $branch)
    {
        return $this->delete('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/branches/'.rawurlencode($branch).'/protection');
    }
public function remove($username, $repository, $branch)
    {
        return $this->delete('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/branches/'.rawurlencode($branch).'/protection');
    }
public function remove ( $ username , $ repository , $ branch ) { return $ this -> delete ( '/repos/' . rawurlencode ( $ username ) . '/' . rawurlencode ( $ repository ) . '/branches/' . rawurlencode ( $ branch ) . '/protection' ) ; }
Remove the repo's branch protection.

@link https://developer.github.com/v3/repos/branches/#remove-branch-protection

@param string $username   The user who owns the repository
@param string $repository The name of the repo
@param string $branch     The name of the branch
Remove the repo s branch protection .