fix remote println!

Author: chnlkw

src/ucp/endpoint/mod.rs

@@ -93,16 +93,13 @@ impl Endpoint {
         let ptr = Weak::into_raw(weak);
         unsafe extern "C" fn callback(arg: *mut c_void, ep: ucp_ep_h, status: ucs_status_t) {
             let weak: Weak<EndpointInner> = Weak::from_raw(arg as _);
-            println!("error callback");
             if let Some(inner) = weak.upgrade() {
                 inner.set_status(status);
                 // don't drop weak reference
-                println!("no drop");
                 // panic!("{:?}",Error::from_status(status));
                 std::mem::forget(weak);
             } else {
                 // no strong rc, force close endpoint here
-                println!("failed");
                 let status = ucp_ep_close_nb(ep, ucp_ep_close_mode::UCP_EP_CLOSE_MODE_FORCE as _);
                 let _ = Error::from_ptr(status)
                     .map_err(|err| error!("Force close endpoint failed, {}", err));