[Translate] Remove identical language logic for the new Tab UI

When I rebased crrev.com/c/1921655 I accidentally reverted this
part of crrev.com/c/1918655.

Bug: 976352
Change-Id: I6d74e6d21f0b91fd41a9ba007a88c566c3e7bc6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1935491Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: Megan Jablonski <megjablon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719279}

chrome/browser/ui/views/translate/translate_bubble_view.cc

@@ -696,14 +696,7 @@ void TranslateBubbleView::ShowOriginal() {
 void TranslateBubbleView::ConfirmAdvancedOptions() {
   model_->SetAlwaysTranslate(should_always_translate_);
   if (bubble_ui_model_ == language::TranslateUIBubbleModel::TAB) {
-    // Switch back to the original page language if target language is the same
-    // as source language without triggering translating.
-    if (target_language_combobox_->GetSelectedIndex() ==
-        model_->GetOriginalLanguageIndex()) {
-      SwitchView(TranslateBubbleModel::VIEW_STATE_AFTER_TRANSLATE);
-      tabbed_pane_->SelectTabAt(0);
-      ShowOriginal();
-    } else if (model_->IsPageTranslatedInCurrentLanguages()) {
+    if (model_->IsPageTranslatedInCurrentLanguages()) {
       SwitchView(TranslateBubbleModel::VIEW_STATE_BEFORE_TRANSLATE);
       SizeToContents();
     } else {