Remove Codecov from CI

Coveralls seems to be working well.

.github/workflows/ci.yml

@@ -41,27 +41,6 @@ jobs:
           profile: minimal
       - run: cargo build --all-features --benches
 
-  codecov:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          target: x86_64-unknown-linux-gnu
-          override: true
-      - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@cargo-llvm-cov
-      - name: Generate code coverage
-        run: cargo llvm-cov --workspace --lcov --output-path lcov.info
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          files: lcov.info
-          fail_ci_if_error: false
-
   coveralls:
     runs-on: ubuntu-latest
     steps:

README.md

@@ -4,7 +4,6 @@
 [![Docs][docs-image]][docs-link]
 ![License][license-image]
 [![Build Status][build-image]][build-link]
-[![Coverage][coverage-image]][coverage-link]
 [![Coveralls][coveralls-image]][coveralls-link]
 
 
@@ -38,7 +37,5 @@ We try to find the balance between supporting the majority of protocols and keep
 [license-image]: https://img.shields.io/crates/l/manul
 [build-image]: https://github.com/entropyxyz/manul/actions/workflows/ci.yml/badge.svg?branch=master&event=push
 [build-link]: https://github.com/entropyxyz/manul/actions?query=workflow%3Aci
-[coverage-image]: https://codecov.io/gh/entropyxyz/manul/branch/master/graph/badge.svg
-[coverage-link]: https://codecov.io/gh/entropyxyz/manul
 [coveralls-image]: https://coveralls.io/repos/github/entropyxyz/manul/badge.svg?branch=master
 [coveralls-link]: https://coveralls.io/github/entropyxyz/manul?branch=master