mpc85xx-p1010: remove TP-Link WDR4900

Remove support for the TP-Link WDR4900, as it us currently unable to
load its kernel sure to factory bootloader constraints.

Progress on this topic is tracked in #2491

docs/user/supported_devices.rst

@@ -218,10 +218,6 @@ mpc85xx-p1010
 
   - RED 15w Rev.1
 
-* TP-Link
-
-  - TL-WDR4900 (v1)
-
 mpc85xx-p1020
 ---------------
 

targets/mpc85xx-p1010

@@ -5,6 +5,3 @@ device('sophos-red-15w-rev.1', 'sophos_red-15w-rev1', {
 })
 
 
--- TP-Link
-
-device('tp-link-tl-wdr4900-v1', 'tplink_tl-wdr4900-v1')