diff --git a/src/objective-c/examples/Sample/Sample/AppDelegate.h b/src/objective-c/examples/Sample/Sample/AppDelegate.h
index 867e62842aecaf7cb061f3f363c3947b31b513c7..b1857f28e085296371588bda81f72275bc3b911a 100644
--- a/src/objective-c/examples/Sample/Sample/AppDelegate.h
+++ b/src/objective-c/examples/Sample/Sample/AppDelegate.h
@@ -37,6 +37,5 @@
 
 @property (strong, nonatomic) UIWindow *window;
 
-
 @end
 
diff --git a/src/objective-c/examples/Sample/Sample/AppDelegate.m b/src/objective-c/examples/Sample/Sample/AppDelegate.m
index 66fceffd85cb40e55921fd0c5c2bca058ddcb7d7..12e1ad9d676c3cde59e1653ca4a8f59c98174c09 100644
--- a/src/objective-c/examples/Sample/Sample/AppDelegate.m
+++ b/src/objective-c/examples/Sample/Sample/AppDelegate.m
@@ -34,37 +34,12 @@
 #import "AppDelegate.h"
 
 @interface AppDelegate ()
-
 @end
 
 @implementation AppDelegate
 
-
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-  // Override point for customization after application launch.
   return YES;
 }
 
-- (void)applicationWillResignActive:(UIApplication *)application {
-  // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
-  // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
-}
-
-- (void)applicationDidEnterBackground:(UIApplication *)application {
-  // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
-  // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
-}
-
-- (void)applicationWillEnterForeground:(UIApplication *)application {
-  // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
-}
-
-- (void)applicationDidBecomeActive:(UIApplication *)application {
-  // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
-}
-
-- (void)applicationWillTerminate:(UIApplication *)application {
-  // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
-}
-
 @end
diff --git a/src/objective-c/examples/Sample/Sample/ViewController.h b/src/objective-c/examples/Sample/Sample/ViewController.h
index 38cd7f92b660a1ca327a66138f6c1d50e69dba69..c0b4aca77ebc160b4a9040854fbee4e8402699a7 100644
--- a/src/objective-c/examples/Sample/Sample/ViewController.h
+++ b/src/objective-c/examples/Sample/Sample/ViewController.h
@@ -34,7 +34,4 @@
 #import <UIKit/UIKit.h>
 
 @interface ViewController : UIViewController
-
-
 @end
-
diff --git a/src/objective-c/examples/Sample/Sample/ViewController.m b/src/objective-c/examples/Sample/Sample/ViewController.m
index 8c97d14ff7d8e8a98d152cc543a46376a3b1677c..c7d8e0d14545c4004cfcab22431b165add3fc33c 100644
--- a/src/objective-c/examples/Sample/Sample/ViewController.m
+++ b/src/objective-c/examples/Sample/Sample/ViewController.m
@@ -40,14 +40,12 @@
 #import <RemoteTest/Messages.pb.h>
 
 @interface ViewController ()
-
 @end
 
 @implementation ViewController
 
 - (void)viewDidLoad {
   [super viewDidLoad];
-  // Do any additional setup after loading the view, typically from a nib.
 
   GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:@"grpc.testing"
                                                          interface:@"TestService"
@@ -74,9 +72,4 @@
   [call startWithWriteable:responsesWriteable];
 }
 
-- (void)didReceiveMemoryWarning {
-  [super didReceiveMemoryWarning];
-  // Dispose of any resources that can be recreated.
-}
-
 @end