Clean obsolete imports and declaration

Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I9fa1ff3ed9abbf5fcbed72b6a3c805194561c528
Reviewed-on: https://chromium-review.googlesource.com/1108450Reviewed-by: Eric Noyau <noyau@chromium.org>
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569297}

ios/chrome/browser/tabs/tab.h

@@ -17,7 +17,6 @@
 @class AutofillController;
 @class CastController;
 @class ExternalAppLauncher;
-@class FormInputAccessoryViewController;
 class GURL;
 @class OpenInController;
 @class OverscrollActionsController;

ios/chrome/browser/tabs/tab.mm

@@ -40,8 +40,6 @@
 #include "components/url_formatter/url_formatter.h"
 #import "ios/chrome/browser/app_launcher/app_launcher_tab_helper.h"
 #include "ios/chrome/browser/application_context.h"
-#import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
-#import "ios/chrome/browser/autofill/form_suggestion_tab_helper.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #import "ios/chrome/browser/download/download_manager_tab_helper.h"

ios/chrome/test/app/tab_test_util.mm

@@ -8,7 +8,6 @@
 
 #import "base/mac/foundation_util.h"
 #import "ios/chrome/app/main_controller_private.h"
-#import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
 #include "ios/chrome/browser/experimental_flags.h"
 #import "ios/chrome/browser/metrics/tab_usage_recorder.h"
 #import "ios/chrome/browser/tabs/tab.h"