ath79: remove kmod-ath9k and wpad from Mikrotik RB750r2
The RB750r2 (HEXLite) does not have wifi and those packages bloat the image
by a significant amount. When building a custom image with WireGuard and
booting that from initramfs, there wasn't enough space left in tmpfs to
upload and flash the squashfs image. Investigating what packages I could
remove, I discovered these unneeded ones.
Signed-off-by: Eicke Herbertz <wolletd@posteo.de>
Link: https://github.com/openwrt/openwrt/pull/22134
Signed-off-by: Robert Marko <robimarko@gmail.com>