Update API usage

Library/Network/CommandClient.swift

@@ -75,8 +75,7 @@ public class CommandClient: ObservableObject {
                     try client.connect()
                     commandClient = client
                     return
-                } catch {
-                }
+                } catch {}
                 try Task.checkCancellation()
             }
         } catch {

Library/Network/ExtensionPlatformInterface.swift

@@ -167,9 +167,4 @@ public class ExtensionPlatformInterface: NSObject, LibboxPlatformInterfaceProtoc
         }
         tunnel.reasserting = false
     }
-    
-    public func closeTun() throws {
-        tunnel.setTunnelNetworkSettings(nil) { _ in
-        }
-    }
 }