DELETE the specified URI

Example:

\b
    $ wva get files/userfs/WEB/python
    {'file_list': ['files/userfs/WEB/python/.ssh',
                    'files/userfs/WEB/python/README.md']}
    $ wva delete files/userfs/WEB/python/README.md
    ''
    $ wva get files/userfs/WEB/python
    {'file_list': ['files/userfs/WEB/python/.ssh']}

def delete(ctx, uri):
    """DELETE the specified URI

Example:

\b
    $ wva get files/userfs/WEB/python
    {'file_list': ['files/userfs/WEB/python/.ssh',
                    'files/userfs/WEB/python/README.md']}
    $ wva delete files/userfs/WEB/python/README.md
    ''
    $ wva get files/userfs/WEB/python
    {'file_list': ['files/userfs/WEB/python/.ssh']}
    """
    http_client = get_wva(ctx).get_http_client()
    cli_pprint(http_client.delete(uri))