Remove accidental run command

Author: fendor

.github/workflows/test.yml

@@ -29,7 +29,6 @@ jobs:
         uses: haskell/actions/setup@v1
         with:
           ghc-version: ${{ matrix.ghc }}
-          run: xvfb-run -s '-screen 0 640x480x16' -a npm test
       - name: "Install `tree` for MacOs"
         run: |
           brew update