Remove use of "size-request" signal for wxWindow sizing.

This signal has been removed from GTK3. Instead have wxPizza keep track of child
size, and use gtk_widget_set_size_request() for wxWindows in native containers.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71465 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/filepicker.h

@@ -107,8 +107,6 @@ public:     // overrides
     FILEDIRBTN_OVERRIDES
 
 protected:
-    virtual bool GTKShouldConnectSizeRequest() const { return false; }
-
     wxDialog *m_dialog;
 
 private: