Remove code coverage from pr diff bot

This is getting stuck somewhere while running the tests, so I've
temporarily disabled the code coverage checks to allow the browser size
check to run

.github/workflows/pr-diff.yml

@@ -24,10 +24,8 @@ jobs:
           npm ci
           npx lerna bootstrap
           npm run build
-          npm run test:coverage
           cat packages/browser/dist/bugsnag.min.js | wc -c > .diff/size-before-minified
           cat packages/browser/dist/bugsnag.min.js | gzip | wc -c > .diff/size-before-gzipped
-          cp coverage/coverage-summary.json .diff/coverage-before.json
 
       - name: Checkout PR branch
         uses: actions/checkout@v1
@@ -41,10 +39,8 @@ jobs:
           npm ci
           npx lerna bootstrap
           npm run build
-          npm run test:coverage
           cat packages/browser/dist/bugsnag.min.js | wc -c > .diff/size-after-minified
           cat packages/browser/dist/bugsnag.min.js | gzip | wc -c > .diff/size-after-gzipped
-          cp coverage/coverage-summary.json .diff/coverage-after.json
 
       - name: Run danger
         uses: danger/[email protected]

dangerfile.js

@@ -1,18 +1,15 @@
 /* global markdown */
 
 const { readFileSync } = require('fs')
-const coverageDiff = require('coverage-diff')
 
 const before = {
   minified: parseInt(readFileSync(`${__dirname}/.diff/size-before-minified`, 'utf8').trim()),
-  gzipped: parseInt(readFileSync(`${__dirname}/.diff/size-before-gzipped`, 'utf8').trim()),
-  coverage: JSON.parse(readFileSync(`${__dirname}/.diff/coverage-before.json`, 'utf8'))
+  gzipped: parseInt(readFileSync(`${__dirname}/.diff/size-before-gzipped`, 'utf8').trim())
 }
 
 const after = {
   minified: parseInt(readFileSync(`${__dirname}/.diff/size-after-minified`, 'utf8').trim()),
-  gzipped: parseInt(readFileSync(`${__dirname}/.diff/size-after-gzipped`, 'utf8').trim()),
-  coverage: JSON.parse(readFileSync(`${__dirname}/.diff/coverage-after.json`, 'utf8'))
+  gzipped: parseInt(readFileSync(`${__dirname}/.diff/size-after-gzipped`, 'utf8').trim())
 }
 
 const formatKbs = (n) => `${(n / 1000).toFixed(2)} kB`
@@ -36,5 +33,5 @@ markdown(`
 
 ### code coverage diff
 
-${coverageDiff.diff(before.coverage, after.coverage).results}
+<_temporarily disabled_>
 `)