.github: Drop the rust workflows

They are now in coreos-overlay.

sdk_container/src/third_party/portage-stable/.github/workflows/rust-apply-patch.sh

@@ -1,16 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail
-
-git fetch origin
-git checkout -B "${BASE_BRANCH}" "origin/${BASE_BRANCH}"
-
-pushd "virtual/rust" >/dev/null || exit
-VERSION_OLD=$(ls -1 rust-*.ebuild | sed -n "s/rust-\(1.[0-9]*.[0-9]*\).ebuild/\1/p" | sort -ruV | head -n1)
-git mv rust-${VERSION_OLD}.ebuild "rust-${VERSION_NEW}.ebuild"
-# For a complete update we would need to download the upstream ebuild and apply our crossdev patch.
-# Automating this is not done yet and maybe would not work well either and had the same result as just renaming
-# which we did here and has the same effect for minor updates that do not touch the ebuild logic.
-popd >/dev/null || exit
-
-echo ::set-output name=VERSION_OLD::"${VERSION_OLD}"

sdk_container/src/third_party/portage-stable/.github/workflows/rust-pull-request-main.yml

@@ -1,40 +0,0 @@
-on:
-  repository_dispatch:
-    types: [rust-pull-request-main]
-
-jobs:
-  flatcar-rust-prs:
-    runs-on: ubuntu-latest
-    env:
-      GIT_SSH_COMMAND: "ssh -o StrictHostKeyChecking=no"
-    steps:
-      - uses: actions/checkout@v2
-      - name: Fetch latest virtual Rust release
-        id: fetch-latest-release
-        run: |
-          git clone --depth=1 --no-checkout https://github.com/rust-lang/rust
-          versionMain=$(git -C rust ls-remote --tags origin | cut -f2 | sed -n "/refs\/tags\/1.[0-9]*.[0-9]*$/s/^refs\/tags\///p" | sort -ruV | head -n1)
-          rm -rf rust
-          echo ::set-output name=VERSION_MAIN::$(echo ${versionMain})
-          echo ::set-output name=BASE_BRANCH_MAIN::main
-      - name: Apply patch for main
-        id: apply-patch-main
-        env:
-          BASE_BRANCH: ${{ steps.fetch-latest-release.outputs.BASE_BRANCH_MAIN }}
-          VERSION_NEW: ${{ steps.fetch-latest-release.outputs.VERSION_MAIN }}
-        run: .github/workflows/rust-apply-patch.sh
-      - name: Create pull request for main
-        uses: peter-evans/create-pull-request@v3
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          base: ${{ steps.fetch-latest-release.outputs.BASE_BRANCH_MAIN }}
-          branch: rust-${{ steps.fetch-latest-release.outputs.VERSION_MAIN }}-main
-          author: Flatcar Buildbot <buildbot@flatcar-linux.org>
-          committer: Flatcar Buildbot <buildbot@flatcar-linux.org>
-          title: Upgrade virtual Rust in main from ${{ steps.apply-patch-main.outputs.VERSION_OLD }} to ${{ steps.fetch-latest-release.outputs.VERSION_MAIN }}
-          commit-message: Upgrade virtual Rust in main from ${{ steps.apply-patch-main.outputs.VERSION_OLD }} to ${{ steps.fetch-latest-release.outputs.VERSION_MAIN }}
-          body: |
-            Upgrade virtual Rust in main from ${{ steps.apply-patch-main.outputs.VERSION_OLD }} to ${{ steps.fetch-latest-release.outputs.VERSION_MAIN }}
-
-            This PR should be merged together with a corresponding PR in coreos-overlay for [`dev-lang/rust` ${{ steps.fetch-latest-release.outputs.VERSION_MAIN }}](https://github.com/flatcar-linux/coreos-overlay/pull/${{ github.event.client_payload.coreos-overlay-pull-request-number}}).
-          labels: main