Remove alpha releases of PR

Because the action hangs indefinitely and I don't have time to sort out
what is going on.

This entire commit should probably be reverted in the future though, but
 only after the-guild-org/shared-config#540 is
 released

Author: PowerKiKi

.github/workflows/pr.yml

@@ -10,22 +10,6 @@ jobs:
     secrets:
       githubToken: ${{ secrets.GITHUB_TOKEN }}
 
-  alpha:
-    permissions:
-      contents: write
-      id-token: write
-      packages: write
-    uses: the-guild-org/shared-config/.github/workflows/release-snapshot.yml@main
-    if: ${{ github.event.pull_request.title != 'Upcoming Release Changes' }}
-    with:
-      packageManager: pnpm
-      npmTag: alpha
-      buildScript: build
-      nodeVersion: 26
-    secrets:
-      githubToken: ${{ secrets.GITHUB_TOKEN }}
-      npmToken: ${{ secrets.NPM_TOKEN }}
-
   release-candidate:
     permissions:
       contents: write