fix: remove duplicate Client import in Vite plugin

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: wickedev

packages/demo/vite-plugin-hallow.ts

@@ -64,8 +64,6 @@ export function hallowPlugin(options: HallowPluginOptions = {}): Plugin {
 
             return `
 // Generated from ${protoPath}
-import { Client } from "@hallow/grpc-web";
-
 ${stubClass}`;
           }
         );