LibWeb: Avoid including LibJS/Parser.h in a handful of cpp files

Author: https://github.com/awesomekling
Commit: 38c7fdaac1
Pull-request: https://github.com/SerenityOS/serenity/pull/16153
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibWeb/HTML/HTMLElement.cpp

@@ -6,7 +6,6 @@
 
 #include <AK/StringBuilder.h>
 #include <LibJS/Interpreter.h>
-#include <LibJS/Parser.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/IDLEventListener.h>
 #include <LibWeb/DOM/ShadowRoot.h>