Simplify doSSH()

lib/main.dart

@@ -77,18 +77,10 @@ class _MyHomePageState extends State<MyHomePage> {
         22,
         timeout: const Duration(seconds: 0, milliseconds: 500),
       );
-    } on SocketException {
-      setState(() {
-        _output = "SocketException: Could not connect to the server.";
-      });
-      return;
-    }
 
-    try {
       final client = SSHClient(
         socket,
         username: 'test',
-        //onPasswordRequest: () => '123456',
         identities: List.of(keyPair != null ? [keyPair!] : []),
       );