Delete unused ip-check workflow

.gitea/workflows/ip-check.yml

@@ -1,21 +0,0 @@
-name: Check Runner IP Address
-
-on:
-  push:
-    paths:
-      - '.gitea/workflows/ip-check.yml'
-  workflow_dispatch:
-
-jobs:
-  check-ip:
-    runs-on: [dsw]
-    steps:
-      - name: Get runner IP address
-        run: |
-          echo "Runner IP address:"
-          curl ip.sb
-          
-          echo "\nAdditional network information:"
-          hostname -I
-          whoami
-          uname -a