ipq-wifi: drop custom board-2.bins

The BDFs for all boards were upstreamed to the ath10k-firmware
repository and linux-firmware.git.

We switched to the upstream board-2.bin, hence the files can be removed
here.

Keep the ipq-wifi package in case new boards are added. It might take
some time till board-2.bins send upstream are merged.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

package/firmware/ipq-wifi/Makefile

@@ -17,7 +17,7 @@ endef
 # Please send a mail with your device-specific board files upstream.
 # You can find instructions and examples on the linux-wireless wiki:
 # <https://wireless.wiki.kernel.org/en/users/drivers/ath10k/boardfiles>
-ALLWIFIBOARDS:=zyxel_nbg6617 zyxel_wre6606
+ALLWIFIBOARDS:=
 ALLWIFIPACKAGES:=$(foreach BOARD,$(ALLWIFIBOARDS),ipq-wifi-$(BOARD))
 
 define Package/ipq-wifi-default
@@ -51,8 +51,6 @@ Don't install it for any other device!
   PREV_BOARD+=ipq-wifi-$(1)
 endef
 
-$(eval $(call generate-ipq-wifi-package,zyxel_wre6606,board-zyxel_wre6606.bin,ZyXEL WRE6606))
 #$(eval $(call generate-ipq-wifi-package,<devicename>,<filename>,<displayname>))
-$(eval $(call generate-ipq-wifi-package,zyxel_nbg6617,board-zyxel_nbg6617.bin,ZyXEL NBG6617))
 
 $(foreach PACKAGE,$(ALLWIFIPACKAGES),$(eval $(call BuildPackage,$(PACKAGE))))