Remove code coverage upload

Too buggy

Author: sindresorhus

.github/workflows/main.yml

@@ -22,9 +22,4 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install
-      - run: npm run test:coverage
-      - uses: codecov/codecov-action@v5
-        if: matrix.node-version == 20
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          fail_ci_if_error: true
+      - run: npm run test