LibWeb: Remove unused header includes

Author: https://github.com/bgianfo
Commit: 217179a39f
Pull-request: https://github.com/SerenityOS/serenity/pull/9120
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Libraries/LibWeb/Loader/CSSLoader.cpp

@@ -6,9 +6,7 @@
 
 #include <AK/Debug.h>
 #include <AK/URL.h>
-#include <LibWeb/CSS/CSSImportRule.h>
 #include <LibWeb/CSS/Parser/DeprecatedCSSParser.h>
-#include <LibWeb/CSS/StyleSheet.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/Element.h>
 #include <LibWeb/Loader/CSSLoader.h>