LibWeb: Remove now-unused LayoutRange and LayoutPosition classes :^)

Author: https://github.com/awesomekling
Commit: 0e53003f72
Pull-request: https://github.com/SerenityOS/serenity/pull/16966
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/emanuele6
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/Page/EditEventHandler.cpp

@@ -12,7 +12,6 @@
 #include <LibWeb/DOM/Text.h>
 #include <LibWeb/HTML/BrowsingContext.h>
 #include <LibWeb/Layout/InitialContainingBlock.h>
-#include <LibWeb/Layout/LayoutPosition.h>
 #include <LibWeb/Page/EditEventHandler.h>
 
 namespace Web {