misc: remove unused workflow

.github/workflows/json-lint.yml

@@ -1,31 +0,0 @@
-name: pr_jsonlint
-
-on:
-  pull_request:
-    paths:
-      - 'module/webui/locales/*.json'
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: 18
-
-      - name: Install JSON linter
-        run: npm install -g jsonlint
-
-      - name: Lint JSON files
-        run: |
-          for file in $(find module/webui/locales -name "*.json"); do
-            echo "Checking $file"
-            if ! jsonlint "$file"; then
-              echo "Error in $file"
-              exit 1
-            fi
-          done