LibJS: Convert Heap::allocate{,_without_realm}() to NonnullGCPtr

Author: https://github.com/linusg
Commit: 22089436ed
Pull-request: https://github.com/SerenityOS/serenity/pull/16498
Reviewed-by: https://github.com/trflynn89 ✅

Userland/Libraries/LibJS/Runtime/Date.cpp

@@ -23,7 +23,7 @@ static Crypto::SignedBigInteger const s_one_thousand_bigint { 1'000 };
 
 NonnullGCPtr<Date> Date::create(Realm& realm, double date_value)
 {
-    return *realm.heap().allocate<Date>(realm, date_value, *realm.intrinsics().date_prototype());
+    return realm.heap().allocate<Date>(realm, date_value, *realm.intrinsics().date_prototype());
 }
 
 Date::Date(double date_value, Object& prototype)