disable armhf CI since the worker no longer exists

.github/workflows/build_all.yml

@@ -563,33 +563,6 @@ jobs:
               name: sdrpp_ubuntu_oracular_aarch64
               path: ${{runner.workspace}}/sdrpp_debian_amd64.deb
 
-    build_raspios_bullseye_armhf:
-        runs-on: ARM
-
-        steps:
-        - uses: actions/checkout@v4
-
-        - name: Create Build Environment
-          run: rm -rf ${{runner.workspace}}/build && cmake -E make_directory ${{runner.workspace}}/build
-        
-        - name: Prepare CMake
-          working-directory: ${{runner.workspace}}/build
-          run: cmake $GITHUB_WORKSPACE -DOPT_BUILD_BLADERF_SOURCE=ON -DOPT_BUILD_LIMESDR_SOURCE=ON -DOPT_BUILD_SDRPLAY_SOURCE=ON -DOPT_BUILD_NEW_PORTAUDIO_SINK=ON -DOPT_BUILD_M17_DECODER=ON -DOPT_BUILD_USRP_SOURCE=ON -DOPT_BUILD_PERSEUS_SOURCE=ON
-
-        - name: Build
-          working-directory: ${{runner.workspace}}/build
-          run: make VERBOSE=1 -j3
-
-        - name: Create Dev Archive
-          working-directory: ${{runner.workspace}}
-          run: sh $GITHUB_WORKSPACE/make_debian_package.sh ./build 'libfftw3-dev, libglfw3-dev, libvolk2-dev, librtaudio-dev' && mv sdrpp_debian_amd64.deb sdrpp_debian_armhf.deb
-        
-        - name: Save Deb Archive
-          uses: actions/upload-artifact@v4
-          with:
-              name: sdrpp_raspios_bullseye_armhf
-              path: ${{runner.workspace}}/sdrpp_debian_armhf.deb
-
     build_android:
         runs-on: ubuntu-latest
 
@@ -638,7 +611,6 @@ jobs:
           'build_ubuntu_noble_aarch64',
           'build_ubuntu_oracular_amd64',
           'build_ubuntu_oracular_aarch64',
-          'build_raspios_bullseye_armhf',
           'build_android'
         ]
         runs-on: ubuntu-latest
@@ -669,7 +641,6 @@ jobs:
             mv sdrpp_ubuntu_noble_aarch64/sdrpp_debian_amd64.deb sdrpp_all/sdrpp_ubuntu_noble_aarch64.deb &&
             mv sdrpp_ubuntu_oracular_amd64/sdrpp_debian_amd64.deb sdrpp_all/sdrpp_ubuntu_oracular_amd64.deb &&
             mv sdrpp_ubuntu_oracular_aarch64/sdrpp_debian_amd64.deb sdrpp_all/sdrpp_ubuntu_oracular_aarch64.deb &&
-            mv sdrpp_raspios_bullseye_armhf/sdrpp_debian_armhf.deb sdrpp_all/sdrpp_raspios_bullseye_armhf.deb &&
             mv sdrpp_android/sdrpp.apk sdrpp_all/sdrpp.apk
 
         - uses: actions/upload-artifact@v4