[ios][PhishGuard] Remove unnecessary use of PASSWORD_REUSE_DETECTION_ENABLED

Design doc: go/bling-phishguard

This CL continues work to compile code in iOS that was previously
disabled behind PASSWORD_REUSE_DETECTION_ENABLED.

Bug: 1147962
Change-Id: I6a22a7b44d3b2948a99cc5e0dbe409061ec22745
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2537593
Commit-Queue: edchin <edchin@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Ali Juma <ajuma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827289}

components/password_manager/core/browser/password_sync_util_unittest.cc

@@ -15,10 +15,6 @@
 #include "components/prefs/testing_pref_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-#if defined(PASSWORD_REUSE_DETECTION_ENABLED)
-#include "components/safe_browsing/core/common/safe_browsing_prefs.h"  // nogncheck
-#endif  // PASSWORD_REUSE_DETECTION_ENABLED
-
 using base::ASCIIToUTF16;
 
 namespace password_manager {
@@ -134,21 +130,5 @@ TEST_F(PasswordSyncUtilTest, IsSyncAccountEmail) {
   }
 }
 
-#if defined(PASSWORD_REUSE_DETECTION_ENABLED)
-class PasswordSyncUtilEnterpriseTest : public SyncUsernameTestBase {
- public:
-  void SetUp() override {
-    // prefs_ = std::make_unique<TestingPrefServiceSimple>();
-    prefs_.registry()->RegisterListPref(prefs::kPasswordProtectionLoginURLs);
-    prefs_.registry()->RegisterStringPref(
-        prefs::kPasswordProtectionChangePasswordURL, "");
-  }
-
- protected:
-  TestingPrefServiceSimple prefs_;
-};
-
-#endif  // PASSWORD_REUSE_DETECTION_ENABLED
-
 }  // namespace sync_util
 }  // namespace password_manager