[iOS Clean] Removed old overlay implementation.

ios/clean/chrome/browser/ui/settings/settings_coordinator.mm

Index: ios/clean/chrome/browser/ui/settings/settings_coordinator.mm
diff --git a/ios/clean/chrome/browser/ui/settings/settings_coordinator.mm b/ios/clean/chrome/browser/ui/settings/settings_coordinator.mm
index b01ca7f8c1f175c4af2b42d48dca3b74270079e9..750004fd40f7415f6baea5b27c7e2c71097eb7f4 100644
--- a/ios/clean/chrome/browser/ui/settings/settings_coordinator.mm
+++ b/ios/clean/chrome/browser/ui/settings/settings_coordinator.mm
@@ -6,6 +6,7 @@
 
 #import "ios/chrome/browser/ui/settings/settings_navigation_controller.h"
 #import "ios/clean/chrome/browser/ui/commands/settings_commands.h"
+#import "ios/clean/chrome/browser/ui/overlays/browser_coordinator+overlay_support.h"
 #import "ios/shared/chrome/browser/ui/browser_list/browser.h"
 #import "ios/shared/chrome/browser/ui/commands/command_dispatcher.h"
 #import "ios/shared/chrome/browser/ui/coordinators/browser_coordinator+internal.h"
@@ -33,6 +34,11 @@ - (void)start {
   [super start];
 }
 
+- (void)stop {
+  [super stop];
+  [self overlayWasStopped];
+}
+
 #pragma mark - SettingsNavigationControllerDelegate
 
 - (void)closeSettingsAndOpenUrl:(OpenUrlCommand*)command {
@@ -52,3 +58,11 @@ - (void)closeSettings {
 }
 
 @end
+
+@implementation SettingsCoordinator (OverlaySupport)
+
+- (BOOL)supportsOverlaying {
+  return YES;
+}
+
+@end