LibJS: Support BigInt number formatting with Intl.NumberFormat

Author: https://github.com/trflynn89
Commit: d6e926e5b1
Pull-request: https://github.com/SerenityOS/serenity/pull/12218
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibJS/Runtime/Intl/NumberFormatFunction.cpp

@@ -44,10 +44,6 @@ ThrowCompletionOr<Value> NumberFormatFunction::call()
     // 4. Let x be ? ToNumeric(value).
     value = TRY(value.to_numeric(global_object));
 
-    // FIXME: Support BigInt number formatting.
-    if (value.is_bigint())
-        return vm.throw_completion<InternalError>(global_object, ErrorType::NotImplemented, "BigInt number formatting");
-
     // 5. Return ? FormatNumeric(nf, x).
     // Note: Our implementation of FormatNumeric does not throw.
     auto formatted = format_numeric(global_object, m_number_format, value);