Remove macOS signing config until Apple Developer verification completes

hardenedRuntime triggers code signing which fails without a valid certificate.
Entitlements.plist and Info.plist remain for when signing is re-enabled.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src-tauri/tauri.conf.json

@@ -34,10 +34,6 @@
       "icons/icon.ico",
       "icons/icon.png"
     ],
-    "macOS": {
-      "entitlements": "Entitlements.plist",
-      "hardenedRuntime": true
-    },
     "windows": {
       "digestAlgorithm": "sha256"
     }