Remove `.github/`

This code was imported from GitHub to GitLab. We'll replace the GHA
tests with new ones.

.github/workflows/build-image.yml

@@ -1,45 +0,0 @@
-name: Build Image
-
-on:
-  pull_request:
-    branches:
-      - main
-
-  workflow_dispatch:
-
-jobs:
-  build-image:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        include:
-          - os: centos
-            version: stream9
-          - os: centos
-            version: stream10
-          - os: fedora
-            version: 40
-
-    steps:
-      - name: Update podman
-        run: |
-          # from https://askubuntu.com/questions/1414446/whats-the-recommended-way-of-installing-podman-4-in-ubuntu-22-04
-          ubuntu_version='22.04'
-          key_url="https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/unstable/xUbuntu_${ubuntu_version}/Release.key"
-          sources_url="https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/unstable/xUbuntu_${ubuntu_version}"
-          echo "deb $sources_url/ /" | sudo tee /etc/apt/sources.list.d/devel-kubic-libcontainers-unstable.list
-          curl -fsSL $key_url | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/devel_kubic_libcontainers_unstable.gpg > /dev/null
-          sudo apt update
-          sudo apt install -y podman
-
-      - name: Checkout repository
-        uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4.1.3
-
-      - name: Build
-        run: |
-          podman build --security-opt=label=disable --cap-add=all --device /dev/fuse \
-            -t localhost/${{ matrix.os }}-${{ matrix.version }}-bootc -f Containerfile.${{ matrix.os }}-${{ matrix.version }}
-
-      - name: Run image
-        run: podman run --rm -ti localhost/${{ matrix.os }}-${{ matrix.version }}-bootc bootc --help

.github/workflows/pre-commit.yml

@@ -1,17 +0,0 @@
----
-name: pre_commit
-
-on: # yamllint disable-line rule:truthy
-  pull_request:
-    branches:
-      - main
-
-  workflow_dispatch:
-
-jobs:
-  pre_commit:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4.1.3
-      - uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d # v5.1.0
-      - uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # v3.0.1