Fix code-coverage: Remove serial tests step

- All serial tests are telemetry tests (test_concurrent_telemetry.py and test_telemetry_e2e.py)
- They're already run in the isolated telemetry step
- Running -m serial with --ignore on both files results in 0 tests (exit code 5)

Author: msrathore-db

.github/workflows/code-coverage.yml

@@ -86,22 +86,6 @@ jobs:
             --cov-report=term \
             -v
 
-      #----------------------------------------------
-      #    run serial tests (excluding telemetry) with coverage
-      #----------------------------------------------
-      - name: Run serial tests (excluding telemetry) with coverage
-        continue-on-error: false
-        run: |
-          poetry run pytest tests/e2e \
-            -m "serial" \
-            --ignore=tests/e2e/test_telemetry_e2e.py \
-            --ignore=tests/e2e/test_concurrent_telemetry.py \
-            --cov=src \
-            --cov-append \
-            --cov-report=xml \
-            --cov-report=term \
-            -v
-
       #----------------------------------------------
       #    run telemetry tests with coverage (isolated)
       #----------------------------------------------