rm pre-install step

Author: TheSonOfThomp

.github/workflows/react17.yml

@@ -22,6 +22,8 @@ jobs:
         uses: pnpm/action-setup@v4
         with:
           version: 9.15.0
+          # no cache because we want to test installs from scratch
+          cache: false
 
       - name: Setup Node 18
         uses: actions/setup-node@v4