chore: drop spurious root dependencies block from #585 (#586)

#585's `npm pkg set dependencies.@modelcontextprotocol/sdk` created a
root `dependencies` block — root previously had only devDependencies +
peerDependencies (it IS the published SDK, the upstream sdk is a peer).
Harmless at runtime but pulls sdk into the published tarball's deps.

The original 1.25.2 devDep pin (b9a459a, Jan 26) was because sdk
1.25.3 depended on @hono/node-server@^1.19.9 which didn't exist on
npm yet — long since resolved.

Author: ochafik

package-lock.json

@@ -125,8 +125,5 @@
     "seroval-plugins": "1.4.2",
     "solid-js": "1.9.10",
     "@types/node": "20.19.27"
-  },
-  "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.29.0"
   }
 }