Remove bcm_unit_tests from pipeline

- The `bcm_unit_tests` job in the GitHub actions pipeline fails
  because the Stratum build reports an

      Unknown host: docs.broadcom.com

  error when it attempts to download the Broadcom SDK.

  Removed the job from the pipeline.

Signed-off-by: Derek Foster <justffoulkes@gmail.com>

.github/workflows/pipeline.yml

@@ -69,32 +69,6 @@ jobs:
           export SDE_INSTALL=$SDE_INSTALL_DIR
           xargs -a .github/dpdk-tests.txt bazel test --define target=dpdk --test_tag_filters=-broken,-flaky
 
-  #---------------------------------------------------------------------
-  # bcm_unit_tests
-  #---------------------------------------------------------------------
-  bcm_unit_tests:
-    runs-on: ubuntu-20.04
-
-    steps:
-      - name: Clone stratum repository
-        uses: actions/checkout@v4
-
-      - name: Mount bazel cache
-        uses: actions/cache@v4
-        with:
-          path: "~/.cache/bazel"
-          key: bazel-${{ runner.os }}-bcm-tests-${{ hashFiles('WORKSPACE', '**/*.bzl', '**/BUILD') }}
-          restore-keys: |
-            bazel-${{ runner.os }}-bcm-tests-
-
-      - name: Install prerequisites
-        run: |
-          sudo apt install libelf-dev
-
-      - name: Run unit tests
-        run: |
-          bazel test //stratum/hal/lib/bcm/...
-
   #---------------------------------------------------------------------
   # cdlang_tests (gNMI)
   #---------------------------------------------------------------------