UI/Qt: Replace the Task Manager window with about:processes

Author: https://github.com/trflynn89
Commit: 45d8cd5c9f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3967
Reviewed-by: https://github.com/shannonbooth

UI/Qt/CMakeLists.txt

@@ -10,7 +10,6 @@ target_sources(ladybird PRIVATE
     SettingsDialog.cpp
     Tab.cpp
     TabBar.cpp
-    TaskManagerWindow.cpp
     TVGIconEngine.cpp
     StringUtils.cpp
     WebContentView.cpp