chore: remove test action

.forgejo/workflows/test.yaml

@@ -1,24 +0,0 @@
-name: Test some stuff
-
-on:
-  push:
-    branches:
-      - main
-    paths:
-      - .forgejo/workflows/test.yaml
-
-jobs:
-  test:
-    runs-on: nixos-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v4
-        with:
-          ref: 'main'
-      - name: direnv
-        run: direnv allow
-      - name: treefmt
-        run: |
-          echo "##[group]direnv/treefmt"
-          direnv allow
-          treefmt