fix(manifest): remove privacy_policies key, unsupported by dxt schema

Author: aborruso

manifest.json

@@ -15,13 +15,8 @@
   },
   "license": "MIT",
   "keywords": ["ckan", "open-data", "data-portal"],
-  "privacy_policies": [
-    {
-      "url": "https://github.com/ondata/ckan-mcp-server/blob/main/PRIVACY.md"
-    }
-  ],
   "icon": "icon.png",
-"server": {
+  "server": {
     "type": "node",
     "entry_point": "server/index.js",
     "mcp_config": {