Deletes a key. Always returns True

    CLI Example:

    .. code-block:: bash

        salt myminion boto_ec2.delete_key mykey

def delete_key(key_name, region=None, key=None, keyid=None, profile=None):
    '''
    Deletes a key. Always returns True

    CLI Example:

    .. code-block:: bash

        salt myminion boto_ec2.delete_key mykey
    '''
    conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)

    try:
        key = conn.delete_key_pair(key_name)
        log.debug("the key to return is : %s", key)
        return key
    except boto.exception.BotoServerError as e:
        log.debug(e)
        return False