[ios clean] Updates all BrowserCoordinator to the new rule

ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h

Index: ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
diff --git a/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h b/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
index c5e725ff6816cfac702bbbdc85386fd3a31d1545..20987e09ae16a693a4b2511371ad86f24a21676b 100644
--- a/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
+++ b/ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h
@@ -8,7 +8,6 @@
 #import <UIKit/UIKit.h>
 
 class Browser;
-@class CoordinatorContext;
 
 // An object that manages a UI component via a view controller.
 // This is the public interface to this class; subclasses should also import
@@ -17,9 +16,6 @@ class Browser;
 // call, or reset.
 @interface BrowserCoordinator : NSObject
 
-// The context object for this coordinator.
-@property(nonatomic, strong, readonly) CoordinatorContext* context;
-
 // The browser object used by this coordinator and passed into any child
 // coordinators added to it. This is a weak pointer, and setting this property
 // doesn't transfer ownership of the browser.