LibWeb: Make is_identifier always return false the simple way

Author: https://github.com/shlyakpavel
Commit: b6561f5e2b
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2984
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/gmta

Libraries/LibWeb/HTML/SyntaxHighlighter/SyntaxHighlighter.cpp

@@ -14,10 +14,8 @@
 
 namespace Web::HTML {
 
-bool SyntaxHighlighter::is_identifier(u64 token) const
+bool SyntaxHighlighter::is_identifier(u64) const
 {
-    if (!token)
-        return false;
     return false;
 }