frontend: Remove test coverage tracking (#11883)

The `ember-cli-code-coverage` package isn't well maintained anymore and since we don't really look at the results anyway, we might as well remove it. This also removes a bunch of outdated transitive dependencies and resolves a few minor CI issues around coverage merging etc.

Author: Turbo87

.github/workflows/ci.yml

@@ -262,10 +262,10 @@ jobs:
       - run: pnpm install
 
       - if: github.repository == 'rust-lang/crates.io'
-        run: pnpm percy exec --parallel -- pnpm test-coverage
+        run: pnpm percy exec --parallel -- pnpm test
 
       - if: github.repository != 'rust-lang/crates.io'
-        run: pnpm test-coverage
+        run: pnpm test
 
   msw-test:
     name: Frontend / Test (@crates-io/msw)

ember-cli-build.js

@@ -39,7 +39,6 @@ module.exports = function (defaults) {
       plugins: [
         require.resolve('ember-auto-import/babel-plugin'),
         require.resolve('ember-concurrency/async-arrow-task-transform'),
-        ...require('ember-cli-code-coverage').buildBabelPlugin({ embroider: true }),
       ],
     },
 

package.json

@@ -30,7 +30,6 @@
     "start:local": "ember serve --proxy http://127.0.0.1:8888",
     "start:staging": "ember serve --proxy https://staging-crates-io.herokuapp.com",
     "test": "ember test",
-    "test-coverage": "COVERAGE=true npm run test && ember coverage-merge && rm -rf coverage_* coverage/coverage-summary.json && nyc report",
     "e2e": "playwright test"
   },
   "prettier": {
@@ -89,7 +88,6 @@
     "ember-cli": "6.7.0",
     "ember-cli-babel": "8.2.0",
     "ember-cli-bundle-analyzer": "1.0.0",
-    "ember-cli-code-coverage": "3.1.0",
     "ember-cli-dependency-checker": "3.3.3",
     "ember-cli-dependency-lint": "2.0.1",
     "ember-cli-head": "2.0.0",
@@ -136,7 +134,6 @@
     "match-json": "1.3.7",
     "memory-scroll": "2.0.1",
     "msw": "2.11.1",
-    "nyc": "17.1.0",
     "playwright-msw": "3.0.1",
     "postcss": "8.5.6",
     "postcss-loader": "8.2.0",