Revert of Showing previews UI for Offline Previews

chrome/browser/android/offline_pages/offline_page_utils.cc

Index: chrome/browser/android/offline_pages/offline_page_utils.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_utils.cc b/chrome/browser/android/offline_pages/offline_page_utils.cc
index 887a2eaf08afa4a10d6072523b0f83da40f61187..e8292101d5c1867ad1ce1e644410213b732c3006 100644
--- a/chrome/browser/android/offline_pages/offline_page_utils.cc
+++ b/chrome/browser/android/offline_pages/offline_page_utils.cc
@@ -109,14 +109,6 @@
 }
 
 // static
-bool OfflinePageUtils::IsShowingOfflinePreview(
-    content::WebContents* web_contents) {
-  OfflinePageTabHelper* tab_helper =
-      OfflinePageTabHelper::FromWebContents(web_contents);
-  return tab_helper && tab_helper->IsShowingOfflinePreview();
-}
-
-// static
 bool OfflinePageUtils::GetTabId(content::WebContents* web_contents,
                                 int* tab_id) {
   TabAndroid* tab_android = TabAndroid::FromWebContents(web_contents);