Revert "ci: add code coverage support"

This reverts commit 03f30cb.

Signed-off-by: Gris Ge <fge@redhat.com>

Author: cathay4t

.github/workflows/main.yml

@@ -19,15 +19,6 @@ jobs:
         run: |
           rustup override set stable
           rustup update stable
-          rustup component add llvm-tools-preview
 
-      - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@cargo-llvm-cov
-
-      - name: Test and Generate code coverage
-        run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
-        with:
-          files: lcov.info
-          fail_ci_if_error: true
+      - name: Test with default feature
+        run: cargo test