usb: Remove duplicated ACM_SUBCLASS definition

ACM_SUBCLASS is already defined in USB CDC header.

Signed-off-by: Andrei Emeltchenko <[email protected]>

Author: finikorg

include/usb/usb_common.h

@@ -103,7 +103,6 @@
 #define DFU_CLASS			0xFE
 
 /* Sub-classes */
-#define ACM_SUBCLASS			0x02
 #define CDC_NCM_SUBCLASS		0x0d
 #define BOOT_INTERFACE_SUBCLASS		0x01
 #define SCSI_TRANSPARENT_SUBCLASS	0x06