Remove unused Interests code.

chrome/android/java/res/layout/new_tab_page_view.xml

Index: chrome/android/java/res/layout/new_tab_page_view.xml
diff --git a/chrome/android/java/res/layout/new_tab_page_view.xml b/chrome/android/java/res/layout/new_tab_page_view.xml
index c9031874fc59f2ec26da27a158aaf413b136870c..5c78e6997003024eaf4c58219545fcb85ca76209 100644
--- a/chrome/android/java/res/layout/new_tab_page_view.xml
+++ b/chrome/android/java/res/layout/new_tab_page_view.xml
@@ -49,26 +49,6 @@
                 android:textColor="#5a5a5a" />
         </FrameLayout>
         <FrameLayout
-            android:id="@+id/interests_button"
-            android:layout_width="0dp"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:background="?attr/listChoiceBackgroundIndicator"
-            android:contentDescription="@string/accessibility_ntp_toolbar_btn_interests"
-            android:paddingBottom="12dp"
-            android:paddingTop="12dp"
-            android:visibility="gone" >
-            <TextView
-                android:layout_gravity="center_horizontal"
-                android:layout_height="match_parent"
-                android:layout_width="wrap_content"
-                android:drawablePadding="8dp"
-                android:gravity="center_vertical"
-                android:text="@string/ntp_interests"
-                android:textColor="#5a5a5a"
-                android:textSize="12sp" />
-        </FrameLayout>
-        <FrameLayout
             android:id="@+id/recent_tabs_button"
             android:layout_width="0dp"
             android:layout_height="match_parent"