chore: Drop unused import

which is likely a debugging artifact.

(cherry picked from commit 4182d27)

lib/src/server/http/mod.rs

@@ -4,7 +4,6 @@
 
 use std::{path::PathBuf, sync::Arc, thread};
 
-use crate::core::runtime;
 use actix_files as fs;
 use actix_web::{web, App, HttpResponse, HttpServer, Responder, Result};
 use tokio::runtime::Runtime;