Revert "[ios][PhishGuard] Port code to ios_chrome_password_store_factory"

This reverts commit 8d720de8.

Reason for revert: Compile failure on ios-device

'components/password_manager/core/browser/password_store_signin_notifier_impl.h' file not found

https://ci.chromium.org/p/chromium/builders/ci/ios-device/172358

Original change's description:
> [ios][PhishGuard] Port code to ios_chrome_password_store_factory
>
> Design doc: go/bling-phishguard
>
> The password_store_factory had already been forked between
> //chrome and //ios. This CL ports password reuse detection code
> from //chrome into the //ios implementation.
>
> Runtime changes are behind the kPasswordReuseDetectionEnabled
> feature flag.
>
> Bug: 1147962
> Change-Id: Iaa5c31759383870753ab94aac14f798ab6634cfe
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2544748
> Commit-Queue: edchin <edchin@chromium.org>
> Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#828562}

TBR=vasilii@chromium.org,edchin@chromium.org

Change-Id: I2286176790447a0dc192c01a6f4a888699f77c70
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1147962
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2546302Reviewed-by: Jiewei Qian  <qjw@chromium.org>
Commit-Queue: Jiewei Qian  <qjw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828566}

ios/chrome/browser/passwords/BUILD.gn

@@ -63,7 +63,6 @@ source_set("passwords") {
     "//components/password_manager/ios",
     "//components/prefs",
     "//components/security_state/core",
-    "//components/signin/public/identity_manager",
     "//components/strings",
     "//components/sync",
     "//components/translate/core/browser:browser",

ios/chrome/browser/passwords/ios_chrome_password_store_factory.cc

@@ -9,7 +9,6 @@
 
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
-#include "base/feature_list.h"
 #include "base/no_destructor.h"
 #include "base/sequenced_task_runner.h"
 #include "base/task/post_task.h"
@@ -21,39 +20,15 @@
 #include "components/password_manager/core/browser/password_manager_util.h"
 #include "components/password_manager/core/browser/password_store_default.h"
 #include "components/password_manager/core/browser/password_store_factory_util.h"
-#include "components/password_manager/core/browser/password_store_signin_notifier_impl.h"
-#include "components/password_manager/core/common/password_manager_features.h"
-#include "components/signin/public/identity_manager/identity_manager.h"
 #include "components/sync/driver/sync_service.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/browser_state_otr_helper.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/passwords/credentials_cleaner_runner_factory.h"
-#include "ios/chrome/browser/signin/identity_manager_factory.h"
 #include "ios/chrome/browser/sync/profile_sync_service_factory.h"
 #include "ios/chrome/browser/webdata_services/web_data_service_factory.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"
 
-namespace {
-
-bool IsPasswordReuseDetectionEnabled() {
-  return base::FeatureList::IsEnabled(
-      password_manager::features::kPasswordReuseDetectionEnabled);
-}
-
-std::string GetSyncUsername(signin::IdentityManager* identity_manager) {
-  return identity_manager ? identity_manager->GetPrimaryAccountInfo().email
-                          : std::string();
-}
-
-bool IsSignedIn(signin::IdentityManager* identity_manager) {
-  return identity_manager
-             ? !identity_manager->GetAccountsWithRefreshTokens().empty()
-             : false;
-}
-
-}  // namespace
-
 // static
 scoped_refptr<password_manager::PasswordStore>
 IOSChromePasswordStoreFactory::GetForBrowserState(
@@ -94,12 +69,6 @@ IOSChromePasswordStoreFactory::IOSChromePasswordStoreFactory()
           "PasswordStore",
           BrowserStateDependencyManager::GetInstance()) {
   DependsOn(ios::WebDataServiceFactory::GetInstance());
-
-  if (IsPasswordReuseDetectionEnabled()) {
-    // TODO(crbug.com/715987). Remove when PasswordReuseDetector is decoupled
-    // from PasswordStore.
-    DependsOn(IdentityManagerFactory::GetInstance());
-  }
 }
 
 IOSChromePasswordStoreFactory::~IOSChromePasswordStoreFactory() {}
@@ -130,19 +99,6 @@ IOSChromePasswordStoreFactory::BuildServiceInstanceFor(
     LOG(WARNING) << "Could not initialize password store.";
     return nullptr;
   }
-
-  if (IsPasswordReuseDetectionEnabled()) {
-    signin::IdentityManager* identity_manager =
-        IdentityManagerFactory::GetForBrowserState(
-            ChromeBrowserState::FromBrowserState(context));
-
-    store->PreparePasswordHashData(GetSyncUsername(identity_manager),
-                                   IsSignedIn(identity_manager));
-    store->SetPasswordStoreSigninNotifier(
-        std::make_unique<password_manager::PasswordStoreSigninNotifierImpl>(
-            identity_manager));
-  }
-
   password_manager_util::RemoveUselessCredentials(
       CredentialsCleanerRunnerFactory::GetForBrowserState(context), store,
       ChromeBrowserState::FromBrowserState(context)->GetPrefs(),