remove un-necessary lock #1558

Author: ptrthomas

karate-core/src/main/java/com/intuit/karate/core/ScenarioEngine.java

@@ -1173,9 +1173,7 @@ private Object recurseAndAttachAndDeepClone(Object o, Set<Object> seen) {
     // only for callonce and callSingle
     protected Object recurseAndDetachAndDeepClone(Object o) {
         Set<Object> seen = Collections.newSetFromMap(new IdentityHashMap());
-        synchronized (runtime.featureRuntime.suite) {
-            return recurseAndDetachAndDeepClone(o, seen);
-        }
+        return recurseAndDetachAndDeepClone(o, seen);
     }
 
     private Object recurseAndDetachAndDeepClone(Object o, Set<Object> seen) {