drivers/usb/storage/realtek_cr.c: fix build
drivers/usb/storage/realtek_cr.c: fix build

Remove unused local `us', which broke the build.  Also nuke an unneeded
cast.

Repairs commit 191648d03d20 ("usb: storage: Convert US_DEBUGP to
usb_stor_dbg").

Cc: Joe Perches <16a9a54ddf4259952e3c118c763138e83693d7fd@perches.com>
Acked-by: David Rientjes <d8cd2994e15bc61ddb2b113030bda55eebc3a0fe@google.com>
Cc: Greg KH <79e2475f81a6317276bf7cbb3958b20d289b78df@kroah.com>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas