--- a/layers.sysdef.xml	Tue Oct 19 14:23:03 2010 +0800
+++ b/layers.sysdef.xml	Wed Oct 20 12:04:53 2010 +0800
@@ -8,14 +8,8 @@
     <layer name="os_layer">
       <module name="usb">
         <unit unitID="usbdo.usb" mrp="" bldFile="&layer_real_source_path;/group" name="usb" />
-      </module>
-      <module name="">
-        <unit unitID="usbdo.usb.usbextension" mrp="" bldFile="&layer_real_source_path;/usbextension/group" filter="!sf_build" name="usb_usbextension" />
-        <unit unitID="usbdo.usb.usb_plat.usb_audio_types_api" mrp="" bldFile="&layer_real_source_path;/usb_plat/usb_audio_types_api/group" filter="!sf_build" name="usb_usb_plat_usb_audio_types_api" />
-        <unit unitID="usbdo.usb.usb_plat.usb_audio_stream_plugin_api" mrp="" bldFile="&layer_real_source_path;/usb_plat/usb_audio_stream_plugin_api/group" filter="!sf_build" name="usb_usb_plat_usb_audio_stream_plugin_api" />
-        <unit unitID="usbdo.usb.usb_plat.usb_audio_capability_plugin_api" mrp="" bldFile="&layer_real_source_path;/usb_plat/usb_audio_capability_plugin_api/group" filter="!sf_build" name="usb_usb_plat_usb_audio_capability_plugin_api" />
-        <unit unitID="usbdo.usb.usb_plat.usb_audio_class_api" mrp="" bldFile="&layer_real_source_path;/usb_plat/usb_audio_class_api/group" filter="!sf_build" name="usb_usb_plat_usb_audio_class_api" />
-      </module>    
+      </module> 
     </layer>
   </systemModel>
 </SystemDefinition>
+