USB: Remove remnants of Wireless USB and UWB

Wireless USB has long been defunct, and kernel support for it was
removed in 2020 by commit caa6772db4 ("Staging: remove wusbcore and
UWB from the kernel tree.").

Nevertheless, some vestiges of the old implementation still clutter up
the USB subsystem and one or two other places.  Let's get rid of them
once and for all.

The only parts still left are the user-facing APIs in
include/uapi/linux/usb/ch9.h.  (There are also a couple of misleading
instances, such as the Sierra Wireless USB modem, which is a USB modem
made by Sierra Wireless.)

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/b4f2710f-a2de-4fb0-b50f-76776f3a961b@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/uapi/linux/usb/ch11.h

@@ -15,10 +15,8 @@
 /* This is arbitrary.
  * From USB 2.0 spec Table 11-13, offset 7, a hub can
  * have up to 255 ports. The most yet reported is 10.
- *
- * Current Wireless USB host hardware (Intel i1480 for example) allows
- * up to 22 devices to connect. Upcoming hardware might raise that
- * limit. Because the arrays need to add a bit for hub status data, we
+ * Upcoming hardware might raise that limit.
+ * Because the arrays need to add a bit for hub status data, we
  * use 31, so plus one evens out to four bytes.
  */
 #define USB_MAXCHILDREN		31

include/uapi/linux/usb/ch9.h

@@ -3,7 +3,7 @@
  * This file holds USB constants and structures that are needed for
  * USB device APIs.  These are used by the USB device model, which is
  * defined in chapter 9 of the USB 2.0 specification and in the
- * Wireless USB 1.0 (spread around).  Linux has several APIs in C that
+ * Wireless USB 1.0 spec (now defunct).  Linux has several APIs in C that
  * need these:
  *
  * - the master/host side Linux-USB kernel driver API;
@@ -14,9 +14,6 @@
  * act either as a USB master/host or as a USB slave/device.  That means
  * the master and slave side APIs benefit from working well together.
  *
- * There's also "Wireless USB", using low power short range radios for
- * peripheral interconnection but otherwise building on the USB framework.
- *
  * Note all descriptors are declared '__attribute__((packed))' so that:
  *
  * [a] they never get padded, either internally (USB spec writers