Remove configuration for codecov

Author: vpapanasta

.github/workflows/ci.yml

@@ -48,9 +48,4 @@ jobs:
         with:
           test-results-junit: test-results/results.xml
           code-coverage-cobertura: code-coverage/coverage.xml
-          source-folder: .
-      - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v4
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          slug: matlab-deep-learning/llms-with-matlab
+          source-folder: .