ui: delete empty function bodies

ui/UIObject.cpp

@@ -42,10 +42,6 @@
 #include "log.h"
 #include "pserror.h"
 
-UIObject::UIObject() {}
-
-UIObject::~UIObject() {}
-
 //	obj = NULL, then this object has no parent: it is an independent entity.
 void UIObject::Create(int x, int y, int w, int h) {
   ASSERT(!m_Created);