remove firmware runner

.gitea/workflows/detectors-firmware.yml

@@ -1,20 +0,0 @@
-name: Build on our own server
-
-on:
-  push:
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-    runs-on: "detectors-firmware"
-    steps:
-      - uses: actions/checkout@v4
-
-
-      - name: Build library 
-        run: |
-            echo "Hello World"
-            hostname