bluetooth: don't register agent

from `bluer` documentation:
It is not required by an application to register an agent. If an application
chooses not to register an agent, the default agent is used. This is in most
cases a good idea. Only applications like a pairing wizard should register
their own agent.

Ref:
https://docs.rs/bluer/latest/bluer/struct.Session.html#method.register_agent

Author: manio

src/bluetooth.rs

@@ -6,7 +6,6 @@ use crate::web::AppState;
 use anyhow::anyhow;
 use backon::{ExponentialBuilder, Retryable};
 use bluer::{
-    agent::Agent,
     rfcomm::{Profile, ProfileHandle, Role, Stream},
     Adapter, Address, Device, Uuid,
 };
@@ -94,10 +93,6 @@ pub async fn init(
         adapter.set_discoverable_timeout(0).await?;
     }
 
-    // Default agent is probably needed when pairing for the first time
-    let agent = Agent::default();
-    let _ = session.register_agent(agent).await?;
-
     // AA Wireless profile
     let profile = Profile {
         uuid: AAWG_PROFILE_UUID,