Don’t auto-register mock BLE services on creation (#746)

bitchatTests/Mocks/MockBLEService.swift

@@ -17,7 +17,6 @@ import CoreBluetooth
 ///   simulated connections between peers. Tests call `simulateConnectedPeer` /
 ///   `simulateDisconnectedPeer` to manage topology.
 /// - `resetTestBus()` clears global state and is called in test `setUp()`.
-/// - `_testRegister()` registers a node immediately on creation for deterministic routing.
 /// - `messageDeliveryHandler` and `packetDeliveryHandler` let tests observe messages/packets
 ///   as they flow, enabling scenarios like manual encryption/relay.
 /// - A thread-safe `seenMessageIDs` set prevents double-delivery races during flooding.
@@ -110,11 +109,6 @@ final class MockBLEService: NSObject {
         if var setB = adjacency[b] { setB.remove(a); adjacency[b] = setB }
     }
 
-    /// Test-only: register this instance on the bus immediately.
-    func _testRegister() {
-        registerIfNeeded()
-    }
-
     func startServices() {
         // Mock implementation - do nothing
     }