staging: unisys: virthba: remove unnecessary return statement

This fixes the following checkpatch.pl warning:
WARNING: void function return statements are not generally useful
Signed-off-by: Catalina Mocanu <catalina.mocanu@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/virthba/virthba.c

@@ -1105,7 +1105,6 @@ virthba_slave_destroy(struct scsi_device *scsidev)
 			return;
 		}
 	}
-	return;
 }
 
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