LibWeb: Remove unused BrowsingContext::scroll_to_anchor()

Author: https://github.com/awesomekling
Commit: 046ae7fe86
Pull-request: https://github.com/SerenityOS/serenity/pull/21167
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Libraries/LibWeb/HTML/BrowsingContext.h

@@ -136,7 +136,6 @@ public:
     Web::EventHandler const& event_handler() const { return m_event_handler; }
 
     void scroll_to(CSSPixelPoint);
-    void scroll_to_anchor(DeprecatedString const&);
 
     JS::GCPtr<BrowsingContext> top_level_browsing_context() const;