Simplify and standardise actions.

.github/workflows/check-javascript-style.yml

@@ -19,17 +19,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Install platform dependencies
-        run: |
-          sudo apt update
-          sudo apt install -y nodejs npm
-
-      - name: Install Node dependencies
-        run: sudo npm install --global yarn
-
       - name: Install Node modules
         run: |
-          export CPPFLAGS="-DPNG_ARM_NEON_OPT=0"
           cd web
           yarn install