Remove coverage testing from CI

Codecov is repeatedly blocking CI from uploading the results.

.github/workflows/ci.yml

@@ -118,18 +118,3 @@ jobs:
           components: rustfmt
       - name: Rustfmt
         run: cargo fmt -- --check
-
-  coverage:
-    runs-on: ubuntu-latest
-    container:
-      image: xd009642/tarpaulin:develop-nightly
-      options: --security-opt seccomp=unconfined
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Generate code coverage
-        run: cargo +nightly tarpaulin --verbose --all-features --workspace --timeout 120 --out xml
-      - name: Upload to codecov.io
-        uses: codecov/codecov-action@v2
-        with:
-          fail_ci_if_error: true

README.md

@@ -1,7 +1,6 @@
 # ndarray-npy
 
 [![Continuous integration](https://github.com/jturner314/ndarray-npy/actions/workflows/ci.yml/badge.svg)](https://github.com/jturner314/ndarray-npy/actions/workflows/ci.yml)
-[![Coverage](https://codecov.io/gh/jturner314/ndarray-npy/branch/master/graph/badge.svg)](https://codecov.io/gh/jturner314/ndarray-npy)
 [![Dependencies status](https://deps.rs/repo/github/jturner314/ndarray-npy/status.svg)](https://deps.rs/repo/github/jturner314/ndarray-npy)
 [![ndarray-npy at crates.io](https://img.shields.io/crates/v/ndarray-npy.svg)](https://crates.io/crates/ndarray-npy)
 [![Documentation](https://docs.rs/ndarray-npy/badge.svg)](https://docs.rs/ndarray-npy)