Revert "CI Linux FFmpeg: apply cartwheel patches"

This reverts commit a30a8945e3.

This doesn't seem to be required anymore (at least xv30 and yuvx work
with Arc A770 and Raptor Lake-P GPU on i7-1355U).

As the patches need to be applied against specific version of FFmpeg
(pinned in db308b17 2023-02-03). Currently the version is from 23th Dec
2024, which is slightly old. That is a half of the year but we also
depend on the cartwheel version bump, which is a bit unfortunate, whereas
is now not cerain, if there is something needed.

.github/scripts/Linux/download_build_ffmpeg.sh

@@ -51,10 +51,6 @@ install_onevpl() {(
 rm -rf /var/tmp/ffmpeg
 git clone --depth $FFMPEG_GIT_DEPTH https://git.ffmpeg.org/ffmpeg.git /var/tmp/ffmpeg
 cd /var/tmp/ffmpeg
-# apply Intel patches
-git clone https://github.com/intel/cartwheel-ffmpeg.git
-git checkout "$(GIT_DIR=cartwheel-ffmpeg/.git git submodule status ffmpeg | sed 's/-\([[:xdigit:]]*\).*/\1/')"
-git am -3 cartwheel-ffmpeg/patches/*
 if [ "$(lsb_release -rs)" = 20.04 ]; then
         git am -3 "$GITHUB_WORKSPACE/.github/scripts/Linux/ffmpeg-patches/0001-removed-bits-incompatible-with-old-vaapi.patch-noauto"
 fi