Bug 848551 - Use same tab thumbnail height on phones and tablets (r=mfinkle)

mobile/android/base/resources/values-xlarge-v11/dimens.xml

@@ -14,7 +14,6 @@
     <dimen name="browser_toolbar_height">56dp</dimen>
     <dimen name="remote_tab_child_row_height">56dp</dimen>
     <dimen name="remote_tab_group_row_height">34dp</dimen>
-    <dimen name="tab_thumbnail_height">114dp</dimen>
     <dimen name="tabs_counter_size">26sp</dimen>
     <dimen name="tabs_panel_indicator_width">60dp</dimen>
     <dimen name="tabs_panel_list_padding">8dip</dimen>