ipq40xx: drop ipq-wifi-teltonika_rutx from Teltonika RUTX50

Drop ipq-wifi-teltonika_rutx from Teltonika RUTX50, the board file was
merged upstream but the ipq package was never dropped from
DEVICE_PACKAGES list.

Signed-off-by: Christian Marangi <[email protected]>

target/linux/ipq40xx/image/generic.mk

@@ -1146,7 +1146,7 @@ define Device/teltonika_rutx50
 	PAGESIZE := 2048
 	FILESYSTEMS := squashfs
 	IMAGE/factory.ubi := append-ubi
-	DEVICE_PACKAGES := ipq-wifi-teltonika_rutx kmod-usb-net-qmi-wwan kmod-usb-serial-option uqmi
+	DEVICE_PACKAGES := kmod-usb-net-qmi-wwan kmod-usb-serial-option uqmi
 endef
 TARGET_DEVICES += teltonika_rutx50