3) Doxygen comment cleanup.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7430 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Bus/Usb/UsbBusDxe/UsbEnumer.c

@@ -54,8 +54,6 @@ UsbGetEndpointDesc (
 
   @param  UsbIf                 The USB interface to free.
 
-  @return None.
-
 **/
 VOID
 UsbFreeInterface (
@@ -191,8 +189,6 @@ ON_ERROR:
 
   @param  Device                The USB device to free.
 
-  @return None.
-
 **/
 VOID
 UsbFreeDevice (
@@ -449,8 +445,6 @@ UsbSelectConfig (
 
   @param  UsbIf                 The interface to disconnect driver from.
 
-  @return None.
-
 **/
 VOID
 UsbDisconnectDriver (
@@ -495,8 +489,6 @@ UsbDisconnectDriver (
 
   @param  Device                The USB device to remove configuration from.
 
-  @return None.
-
 **/
 VOID
 UsbRemoveConfig (
@@ -934,8 +926,6 @@ UsbEnumeratePort (
   @param  Event                 The event that is triggered.
   @param  Context               The context to the event.
 
-  @return None.
-
 **/
 VOID
 EFIAPI
@@ -985,8 +975,6 @@ UsbHubEnumeration (
   @param  Event                 The event that is triggered.
   @param  Context               The context to the event.
 
-  @return None.
-
 **/
 VOID
 EFIAPI