Removed unused feature flag

Author: LoopyAshy

tests/tests/dynamic_fields.rs

@@ -1,4 +1,3 @@
-#[cfg(feature = "dynamic_fields")]
 mod dynamic_fields_tests {
     use std::collections::HashMap;
 
@@ -60,6 +59,9 @@ mod dynamic_fields_tests {
 
     #[test]
     fn test_dynamic_fields_static_strings_first() {
+
+        println!("{}", std::mem::size_of::<rune::runtime::AnyObjVtable>());
+
         #[derive(Any, Clone)]
         #[rune(dynamic_fields="first")]
         struct TestStructStaticFirst {