chore: remove firmware files that are part of mt7xxx-firmware (#1760)

We don't need this at all anymore. mt7xxx-firmware package is included
in our base image already. This is super old tech debt.

```
rpm -qf \
  /usr/lib/firmware/mediatek/WIFI_RAM_CODE_MT7922_1.bin.xz \
  /usr/lib/firmware/mediatek/WIFI_MT7922_patch_mcu_1_1_hdr.bin.xz
```

Author: renner0e

Containerfile

@@ -79,12 +79,6 @@ RUN --mount=type=tmpfs,dst=/boot \
     --mount=type=secret,id=GITHUB_TOKEN \
     /ctx/build_files/base/06-override-install.sh
 
-# Get Firmare for Framework
-RUN --mount=type=tmpfs,dst=/boot \
-    --mount=type=bind,from=ctx,source=/,target=/ctx \
-    --mount=type=cache,dst=/var/cache/libdnf5 \
-    /ctx/build_files/base/08-firmware.sh
-
 # Beta
 RUN --mount=type=tmpfs,dst=/boot \
     --mount=type=bind,from=ctx,source=/,target=/ctx \