github actions temporarily remove linux hardware (navio2) test

- until connectivity issues are resolved

.github/workflows/hardware_tests_linux.yml

@@ -1,29 +0,0 @@
-name: Hardware Linux
-
-on:
-  push:
-    branches:
-    - 'master'
-
-jobs:
-  build:
-    runs-on: [emlid_navio2]
-    steps:
-    - uses: actions/checkout@v1
-
-    - name: Build
-      env:
-        CCACHE_BASEDIR: ${GITHUB_WORKSPACE}
-      run: |
-          make distclean
-          ccache -z
-          make emlid_navio2_default
-          ccache -s
-
-    # sanity check
-    - name: Sanity check
-      run: cd build/emlid_navio2_default/ && ./bin/px4 -s ../../posix-configs/rpi/px4_test.config
-
-    - name: Upload log to flight review
-      run: find . -name *.ulg
-      #run: ./Tools/upload_log.py -q --description "${GITHUB_WORKFLOW} ${GITHUB_RUN_ID}" --feedback "${GITHUB_WORKFLOW} ${GITHUB_RUN_ID} ${GITHUB_REPOSITORY} ${GITHUB_REF}" --source CI ./build/px4_sitl_default/tmp/rootfs/log/*/*.ulg