[Passwords] Remove unnecessary parsing in the PasswordFormManager

This CL removes obsolete code.

Change-Id: I451253435eab20f3a04b5f10ba79ef9b22c149d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1863930
Commit-Queue: Mohamed Amir Yosef <mamir@chromium.org>
Commit-Queue: Vadym Doroshenko <dvadym@chromium.org>
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706899}

components/password_manager/core/browser/password_form_manager.cc

@@ -344,9 +344,6 @@ void PasswordFormManager::Update(const PasswordForm& credentials_to_update) {
   metrics_recorder_->SetSubmissionIndicatorEvent(
       parsed_submitted_form_->submission_event);
 
-  std::unique_ptr<PasswordForm> parsed_observed_form =
-      parser_.Parse(observed_form_, FormDataParser::Mode::kFilling);
-
   base::string16 password_to_save = pending_credentials_.password_value;
   bool skip_zero_click = pending_credentials_.skip_zero_click;
   pending_credentials_ = credentials_to_update;