Clean-up warning filter (#6068)

Author: omichel

resources/qt_warning_filters.conf

@@ -5,6 +5,3 @@
 
 # This warning occurs on Retina display while the framebuffer dimension matches exactly with the 3D view area.
 ^Window\ position\ outside\ any\ known\ screen,\ using\ primary\ screen$
-
-# This warning appeared on Windows after upgrading to Qt 6.4.2
-^setDarkBorderToWindow:\ Unable\ to\ set\ dark\ window\ border.$