Hardcode the list of firmware instead of relying on -headless

kali-config/installer-netinst/packages

@@ -4,6 +4,19 @@
 # This variant is not meant to be used with live-build but only with
 # simple-cdd and thus ./build.sh --installer --variant netinst
 
-# We still put kali-linux-headless just to ensure that simple-cdd's mirror
-# contains the firmwares
-kali-linux-headless
+# We still put kali-linux-core because it's really small
+kali-linux-core
+# And we want firmwares
+bluez-firmware
+firmware-amd-graphics
+firmware-atheros
+firmware-brcm80211
+firmware-intel-sound
+firmware-iwlwifi
+firmware-libertas
+firmware-linux
+firmware-misc-nonfree
+firmware-realtek
+firmware-sof-signed
+firmware-ti-connectivity
+firmware-zd1211