Remove double buffering from wxWebViewIE as this is handled by the web browser control itself and actually makes flickering worse. Also remove an unnecessary background style.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69786 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/webview_ie.cpp

@@ -83,8 +83,6 @@ bool wxWebViewIE::Create(wxWindow* parent,
 
     m_container = new wxActiveXContainer(this, IID_IWebBrowser2, m_webBrowser);
 
-    SetBackgroundStyle(wxBG_STYLE_PAINT);
-    SetDoubleBuffered(true);
     LoadURL(url);
     return true;
 }