deduplicate tests to settle for running through the (cache-friendly) flake

Signed-off-by: Kiara Grouwstra <kiara@procolix.eu>

.forgejo/workflows/ci.yaml

@@ -10,20 +10,8 @@ on:
       - main
 
 jobs:
-  check-pre-commit:
-    runs-on: native
-    steps:
-      - uses: actions/checkout@v4
-      - run: nix-build -A tests
-
   check-data-model:
     runs-on: native
     steps:
       - uses: actions/checkout@v4
       - run: nix-shell --run 'nix-unit ./deployment/data-model-test.nix'
-
-  check-panel:
-    runs-on: native
-    steps:
-      - uses: actions/checkout@v4
-      - run: nix-build -A tests.panel