.github: remove x32 jobs

These jobs need ubuntu-20.04 image that is no longer available in
GitHub Actions.

Link: https://github.blog/changelog/2025-01-15-github-actions-ubuntu-20-runner-image-brownout-dates-and-other-breaking-changes/

Author: ldv-alt

.github/workflows/ci.yml

@@ -206,62 +206,6 @@ jobs:
     - name: build check
       run: ci/run-build-and-tests.sh
 
-  gcc13-x32:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-13
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc11-x32:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-11
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc10-x32:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-10
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc9-x32:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-9
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
   gcc14-x86:
     runs-on: ubuntu-24.04
     env:
@@ -682,66 +626,6 @@ jobs:
     - name: build check
       run: ci/run-build-and-tests.sh
 
-  gcc13-x32-debug:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-13
-      CPPFLAGS: -DUTEMPTER_DEBUG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc11-x32-debug:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-11
-      CPPFLAGS: -DUTEMPTER_DEBUG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc10-x32-debug:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-10
-      CPPFLAGS: -DUTEMPTER_DEBUG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc9-x32-debug:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-9
-      CPPFLAGS: -DUTEMPTER_DEBUG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
   gcc14-x86-debug:
     runs-on: ubuntu-24.04
     env:
@@ -1177,66 +1061,6 @@ jobs:
     - name: build check
       run: ci/run-build-and-tests.sh
 
-  gcc13-x32-log:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-13
-      CPPFLAGS: -DUTEMPTER_LOG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc11-x32-log:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-11
-      CPPFLAGS: -DUTEMPTER_LOG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc10-x32-log:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-10
-      CPPFLAGS: -DUTEMPTER_LOG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
-  gcc9-x32-log:
-    runs-on: ubuntu-20.04
-    env:
-      CC: gcc-9
-      CPPFLAGS: -DUTEMPTER_LOG
-      TARGET: x32
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 0
-    - name: install dependencies
-      run: ci/install-dependencies.sh
-    - name: build check
-      run: ci/run-build-and-tests.sh
-
   gcc14-x86-log:
     runs-on: ubuntu-24.04
     env: