Am looking at the files for 3.0.3+ ('gotten' via git just a few minutes ago) and there is an 'amf' directory in webservices directory. version.php says:
$plugin->version = 2015111600; // The current plugin version (Date: YYYYMMDDXX)
$plugin->requires = 2015111000; // Requires this Moodle version
$plugin->component = 'webservice_amf'; // Full name of the plugin (used for diagnostics)
'spirit of sharing', Ken