Progress bars were pictured twice. Removed one.

Author: Elthan

README.md

@@ -87,8 +87,6 @@ To load the source project you will need Visual Studio 2017.  Don't worry if you
 
 ![Alt text](web/images/screen-treeview.png "Tree View")
 
-![Alt text](web/images/screen-progress.png "Progress Bars")
-
 ![Alt text](web/images/screen-sliders.png "Sliders")
 
 ![Alt text](web/images/screen-typography.png "Typography")