Delete dead code for CurrentlyOpenTabs

chrome/browser/android/ntp/new_tab_page_prefs.h

Index: chrome/browser/android/ntp/new_tab_page_prefs.h
diff --git a/chrome/browser/android/ntp/new_tab_page_prefs.h b/chrome/browser/android/ntp/new_tab_page_prefs.h
index 6238e85938840a450ef2c4833e0876bda0c3e2b8..c17bbc6a1f1111146b576f23a1cf018f02616afb 100644
--- a/chrome/browser/android/ntp/new_tab_page_prefs.h
+++ b/chrome/browser/android/ntp/new_tab_page_prefs.h
@@ -16,14 +16,6 @@ class NewTabPagePrefs {
   explicit NewTabPagePrefs(Profile* profile);
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
-  jboolean GetCurrentlyOpenTabsCollapsed(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj);
-  void SetCurrentlyOpenTabsCollapsed(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj,
-      jboolean is_collapsed);
-
   jboolean GetSnapshotDocumentCollapsed(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);