Remove Codecov integration from CI workflow and README badge

.github/workflows/checkout.yml

@@ -104,13 +104,13 @@ jobs:
         run: |
           flutter test --coverage --concurrency=40 test/unit_test.dart
 
-      - name: 📊 Upload coverage to Codecov
-        id: upload-coverage
-        timeout-minutes: 2
-        uses: codecov/codecov-action@v5
-        continue-on-error: true
-        with:
-          files: ./coverage/lcov.info
-          flags: unittests
-          token: ${{ secrets.CODECOV_TOKEN }}
-          fail_ci_if_error: false
+#      - name: 📊 Upload coverage to Codecov
+#        id: upload-coverage
+#        timeout-minutes: 2
+#        uses: codecov/codecov-action@v5
+#        continue-on-error: true
+#        with:
+#          files: ./coverage/lcov.info
+#          flags: unittests
+#          token: ${{ secrets.CODECOV_TOKEN }}
+#          fail_ci_if_error: false

CHANGELOG.md

@@ -51,7 +51,6 @@
 - **ADDED**: `benchmark/parser_benchmark.dart` (a multi-scenario
   `benchmark_harness` suite) and `benchmark/compare.dart` (a low-noise
   before/after comparison tool).
-- **CI**: Upload coverage to Codecov and add a coverage badge to the README.
 - **DOCS**: Documented alerts, task lists, table alignment, thematic-break
   variants, and opt-in inline math in the README.
 

README.md

@@ -1,7 +1,6 @@
 # flutter_md - Markdown Parser and Renderer for Flutter
 
 [![Checkout](https://github.com/DoctorinaAI/md/actions/workflows/checkout.yml/badge.svg)](https://github.com/DoctorinaAI/md/actions/workflows/checkout.yml)
-[![codecov](https://codecov.io/gh/DoctorinaAI/md/branch/master/graph/badge.svg)](https://codecov.io/gh/DoctorinaAI/md)
 [![Pub Package](https://img.shields.io/pub/v/flutter_md.svg)](https://pub.dev/packages/flutter_md)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Dart](https://img.shields.io/badge/Dart-%230175C2.svg?style=flat&logo=dart&logoColor=white)](https://dart.dev)