docs/qdev-device-use: Clean up the sentences related to -usbdevice

Most of the -usbdevice paramaters have been removed already. Update
the doc accordingly.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id: 20200710065520.24784-1-thuth@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

docs/qdev-device-use.txt

@@ -125,12 +125,7 @@ The -device argument differs in detail for each type of drive:
 
 * if=pflash, if=mtd, if=sd, if=xen are not yet available with -device
 
-For USB devices, the old way is actually different:
-
-    -usbdevice disk:format=FMT:FILENAME
-
-Provides much less control than -drive's OPTS...  The new way fixes
-that:
+For USB storage devices, you can use something like:
 
     -device usb-storage,drive=DRIVE-ID,removable=RMB
 
@@ -177,8 +172,6 @@ The appropriate DEVNAME depends on the machine type.  For type "pc":
 
   This lets you control I/O ports and IRQs.
 
-* -usbdevice serial::chardev becomes -device usb-serial,chardev=dev.
-
 * -usbdevice braille doesn't support LEGACY-CHARDEV syntax.  It always
   uses "braille".  With -device, this useful default is gone, so you
   have to use something like
@@ -238,10 +231,6 @@ The old way to define the guest part looks like this:
 
     -net nic,netdev=NET-ID,macaddr=MACADDR,model=MODEL,name=ID,addr=STR,vectors=V
 
-Except for USB it looks like this:
-
-    -usbdevice net:netdev=NET-ID,macaddr=MACADDR,name=ID
-
 The new way is -device:
 
     -device DEVNAME,netdev=NET-ID,mac=MACADDR,DEV-OPTS...
@@ -336,12 +325,7 @@ The new way is -device DEVNAME,DEV-OPTS...  Details depend on DRIVER:
 * mouse           -device usb-mouse
 * tablet          -device usb-tablet
 * wacom-tablet    -device usb-wacom-tablet
-* host:...        See "Host Device Assignment"
-* disk:...        See "Block Devices"
-* serial:...      See "Character Devices"
 * braille         See "Character Devices"
-* net:...         See "Network Devices"
-* bt:...          not yet available with -device
 
 === Watchdog Devices ===
 
@@ -358,17 +342,11 @@ and host USB devices.  PCI devices can only be assigned with -device:
 
     -device vfio-pci,host=ADDR,id=ID
 
-The old way to assign a host USB device is
-
-    -usbdevice host:auto:BUS.ADDR:VID:PRID
-
-where any of BUS, ADDR, VID, PRID can be the wildcard *.
-
-The new way is
+To assign a host USB device use:
 
     -device usb-host,hostbus=BUS,hostaddr=ADDR,vendorid=VID,productid=PRID
 
-Omitted options match anything, just like the old way's wildcard.
+Omitted options match anything.
 
 === Default Devices ===