remove unused forwardPort; truthier console messages (#12981)

packages/flutter_tools/lib/src/device.dart

@@ -206,22 +206,6 @@ abstract class Device {
   /// Get the port forwarder for this device.
   DevicePortForwarder get portForwarder;
 
-  Future<int> forwardPort(int devicePort, {int hostPort}) async {
-    try {
-      hostPort = await portForwarder
-          .forward(devicePort, hostPort: hostPort)
-          .timeout(const Duration(seconds: 60), onTimeout: () {
-            throw new ToolExit(
-                'Timeout while atempting to foward device port $devicePort');
-          });
-      printTrace('Forwarded host port $hostPort to device port $devicePort');
-      return hostPort;
-    } catch (e) {
-      throw new ToolExit(
-          'Unable to forward host port $hostPort to device port $devicePort: $e');
-    }
-  }
-
   /// Clear the device's logs.
   void clearLogs();
 

packages/flutter_tools/lib/src/ios/devices.dart

@@ -264,7 +264,7 @@ class IOSDevice extends Device {
           return null;
         }
 
-        printTrace('Application launched on the device. Attempting to forward ports.');
+        printTrace('Application launched on the device. Waiting for observatory port.');
         return await forwardObservatoryUri;
       }).whenComplete(() {
         observatoryDiscovery.cancel();

packages/flutter_tools/lib/src/resident_runner.dart

@@ -58,9 +58,10 @@ class FlutterDevice {
       return;
     vmServices = new List<VMService>(observatoryUris.length);
     for (int i = 0; i < observatoryUris.length; i++) {
+      printTrace('Connecting to service protocol: ${observatoryUris[i]}');
       vmServices[i] = await VMService.connect(observatoryUris[i],
           reloadSources: reloadSources);
-      printTrace('Connected to service protocol: ${observatoryUris[i]}');
+      printTrace('Successfully connected to service protocol: ${observatoryUris[i]}');
     }
   }