[escher] In header view controller, delete useless method

Change-Id: I810d03878c01e472dfaf1134897337ebf8a921a0

escher/src/header_view_controller.cpp

@@ -104,6 +104,7 @@ const char * HeaderViewController::title() const {
 }
 
 void HeaderViewController::didBecomeFirstResponder(){
+  m_contentView.layoutSubviews();
   app()->setFirstResponder(m_contentView.mainViewController());
 }
 
@@ -132,7 +133,3 @@ bool HeaderViewController::handleEvent(Ion::Events::Event event) {
   }
   return false;
 }
-
-void HeaderViewController::layoutView() {
-  m_contentView.layoutSubviews();
-}