CI: disable code coverage in GH Action

It is now ran on the nightly CentOS build, so that it can cover
integration tests too, and not just unit tests. It's nightly as
it considerably increases the integration test runtime, so it's
not appropriate for all PRs.

.github/workflows/unit_tests.sh

@@ -9,7 +9,6 @@ ADDITIONAL_DEPS=(
     expect
     fdisk
     jekyll
-    lcov
     libfdisk-dev
     libfido2-dev
     libp11-kit-dev
@@ -48,17 +47,9 @@ for phase in "${PHASES[@]}"; do
                 # The docs build is slow and is not affected by compiler/flags, so do it just once
                 MESON_ARGS+=(-Dman=true)
             fi
-            if [[ "$phase" = "RUN_GCC" ]]; then
-                MESON_ARGS+=(-Db_coverage=true)
-                # See FIXME below
-                (set +x; while :; do echo -ne "\n[WATCHDOG] $(date)\n"; sleep 30; done) &
-            fi
             meson --werror -Dtests=unsafe -Dslow-tests=true -Dfuzz-tests=true "${MESON_ARGS[@]}" build
             ninja -C build -v
             meson test -C build --print-errorlogs
-            if [[ "$phase" = "RUN_GCC" ]]; then
-                ninja -C build coverage
-            fi
             ;;
         RUN_ASAN_UBSAN|RUN_GCC_ASAN_UBSAN|RUN_CLANG_ASAN_UBSAN)
             MESON_ARGS=(--optimization=1)

.github/workflows/unit_tests.yml

@@ -29,9 +29,3 @@ jobs:
       - name: Build & test (${{ matrix.run_phase }})
         run: sudo -E .github/workflows/unit_tests.sh RUN_${{ matrix.run_phase }}
         if: github.event_name == 'pull_request' || matrix.run_phase == 'GCC'
-      - name: Coveralls
-        if: matrix.run_phase == 'GCC' && github.repository == 'systemd/systemd'
-        uses: coverallsapp/github-action@master
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: ./build/meson-logs/coverage.info