chore(build): remove browser from build matrix

Author: benmonro

.github/workflows/eslint-plugin-jest-dom.yml

@@ -14,7 +14,6 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         node: [15, 14, 12, 10]
-        browser: ["chrome:headless", "firefox:headless"]
     steps:
       - uses: actions/setup-node@v1
         with: