remove remote code coverage tracking

No longer interested in tracking this remotely. This is a
developer metric, and can be generated locally as needed.

.github/workflows/tests.yaml

@@ -18,17 +18,3 @@ jobs:
         uses: actions/checkout@v2
       - name: Test Components
         run: make test -C ${{ github.workspace }}
-  coverage:
-    runs-on: ubuntu-latest
-    needs: [components]
-    steps:
-      - name: Update apt and install lcov
-        run: sudo apt update && sudo apt install -y lcov
-      - name: Checkout repository
-        uses: actions/checkout@v2
-      - name: Generate test coverage
-        run: make coverage -C ${{ github.workspace }}
-      - name: Upload coverage data to Codecov
-        uses: codecov/codecov-action@v2
-        with:
-          fail_ci_if_error: true

README.md

@@ -6,8 +6,6 @@
       <img src="https://github.com/adequatesystems/extended-c/actions/workflows/tests.yaml/badge.svg" alt="tests status" /></a>
    <a href="https://github.com/adequatesystems/extended-c/actions/workflows/codeql.yaml">
       <img src="https://github.com/adequatesystems/extended-c/actions/workflows/codeql.yaml/badge.svg" alt="codeql status" /></a>
-   <a href="https://codecov.io/gh/adequatesystems/extended-c">
-      <img src="https://codecov.io/gh/adequatesystems/extended-c/graph/badge.svg" alt="coverage status"></a>
    <br/>
    <a href="https://github.com/adequatesystems/extended-c/tags">
       <img src="https://img.shields.io/github/v/tag/adequatesystems/extended-c?color=0059ff&label=Latest&labelColor=2d3339&logo=github&logoColor=lightgray" alt="GitHub tag (latest by date)"></a>