remove codecov

Author: dotansimha

.github/workflows/main.yml

@@ -51,8 +51,3 @@ jobs:
         run: yarn test:ci --logHeapUsage
         env:
           CI: true
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-