github: remove XTOS testing support

Remove GitHub XTOS build tests. We'll be removing XTOS support
completely, which obviously will lead to all XTOS tests failing.
Note, that this also removes a QEMU boot test. It should be fixed to
work with a Zephyr build and then re-added.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

.github/workflows/pull-request.yml

@@ -61,100 +61,3 @@ jobs:
         run: printf
           'WARN_AS_ERROR = FAIL_ON_WARNINGS\n' >> doc/sof.doxygen.in &&
           ninja -C docbuild -v doc
-
-
-  # This is a bit redundant with the other jobs below and with the (much
-  # faster!) installer[.yml] but it may differ in which platforms are
-  # built.  This makes sure platforms without any open-source toolchain
-  # are added in the right place and do not accidentally break the -a
-  # option, Docker testing etc.
-  gcc-build-default-platforms:
-    runs-on: ubuntu-22.04
-
-    steps:
-      - uses: actions/checkout@v4
-        with: {fetch-depth: 0, submodules: recursive, filter: 'tree:0'}
-
-      - name: docker
-        run: docker pull thesofproject/sof && docker tag thesofproject/sof sof
-
-      - name: xtensa-build-all.sh -a
-        run: ./scripts/docker-run.sh ./scripts/xtensa-build-all.sh -a ||
-             ./scripts/docker-run.sh ./scripts/xtensa-build-all.sh -a -j 1
-
-
-  gcc-build-only:
-    runs-on: ubuntu-22.04
-
-    strategy:
-      fail-fast: false
-      matrix:
-        # Use groups to avoid spamming the web interface. Pay attention
-        # to COMMAS. Don't use a single big group so a single failure
-        # does not block all other builds.
-        platform: [rn rmb,
-                   mt8186 mt8195 mt8188,
-        ]
-
-    steps:
-
-      - uses: actions/checkout@v4
-        with: {fetch-depth: 0, submodules: recursive, filter: 'tree:0'}
-
-      - name: docker
-        run: docker pull thesofproject/sof && docker tag thesofproject/sof sof
-
-      - name: xtensa-build-all.sh platforms
-        env:
-          PLATFORM: ${{ matrix.platform }}
-        run: ./scripts/docker-run.sh
-          ./scripts/xtensa-build-all.sh -r ${PLATFORM}
-
-  # Warning: there is a fair amount of duplication between 'build-only'
-  # and 'qemu-boot' because github does not support YAML anchors as of Jan
-  # 2021.  Defining our new actions would be overkill. Another popular
-  # option is to generate this file from a source with YAML anchors
-  # before committing it; also deemed overkill for the current amount of
-  # duplication.
-
-  qemu-boot-test:
-    runs-on: ubuntu-22.04
-
-    strategy:
-      fail-fast: false
-      matrix:
-        # Compiler-based groups, see HOST= compilers in
-        # xtensa-build-all.sh.  Pay attention to commas and whitespace.
-        # The main reason for these groups is to avoid the matrix
-        # swarming the Github web interface and burying other checks.
-        # See longer example above.
-        platform: [imx8m,
-        ]
-
-    steps:
-
-      - uses: actions/checkout@v4
-        with: {fetch-depth: 0, submodules: recursive, filter: 'tree:0'}
-
-      - name: turn off HAVE_AGENT
-        run: echo CONFIG_HAVE_AGENT=n >
-          src/arch/xtensa/configs/override/no-agent.config
-
-      - name: docker SOF
-        run: docker pull thesofproject/sof && docker tag thesofproject/sof sof
-
-      - name: xtensa-build-all.sh -o no-agent platforms
-        env:
-          PLATFORM: ${{ matrix.platform }}
-        run: ./scripts/docker-run.sh
-          ./scripts/xtensa-build-all.sh -o no-agent -r ${PLATFORM}
-
-      - name: docker QEMU
-        run: docker pull thesofproject/sofqemu &&
-          docker tag thesofproject/sofqemu sofqemu
-
-      - name: qemu-check
-        env:
-          PLATFORM: ${{ matrix.platform }}
-        run: ./scripts/docker-qemu.sh
-          ../sof.git/scripts/qemu-check.sh ${PLATFORM}