chore: Remove unused Value import in nvim plugins

linux-nvim/src/main.rs

@@ -1,7 +1,7 @@
 mod mcp;
 
 use mcp::{read_message, send_response, send_error, JsonRpcResponse};
-use serde_json::{json, Value};
+use serde_json::json;
 use tokio::net::UnixStream;
 use tokio::io::{AsyncReadExt, AsyncWriteExt};