LibJS: Replace standalone js_symbol() with Symbol::create()

Author: https://github.com/linusg
Commit: 1dd8655514
Pull-request: https://github.com/SerenityOS/serenity/pull/16348
Reviewed-by: https://github.com/davidot ✅

Userland/Libraries/LibJS/Runtime/Symbol.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
+ * Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -16,14 +17,9 @@ Symbol::Symbol(Optional<DeprecatedString> description, bool is_global)
 {
 }
 
-Symbol* js_symbol(Heap& heap, Optional<DeprecatedString> description, bool is_global)
+NonnullGCPtr<Symbol> Symbol::create(VM& vm, Optional<DeprecatedString> description, bool is_global)
 {
-    return heap.allocate_without_realm<Symbol>(move(description), is_global);
-}
-
-Symbol* js_symbol(VM& vm, Optional<DeprecatedString> description, bool is_global)
-{
-    return js_symbol(vm.heap(), move(description), is_global);
+    return *vm.heap().allocate_without_realm<Symbol>(move(description), is_global);
 }
 
 }