[GR-17737] Invalid Child annotation in AsyncHandler.

PullRequest: graalpython/618

Author: tzezula

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/AsyncHandler.java

@@ -66,7 +66,6 @@
 import com.oracle.truffle.api.TruffleLanguage;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.nodes.Node;
-import com.oracle.truffle.api.nodes.Node.Child;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
 /**
@@ -183,7 +182,7 @@ public boolean isInternal() {
     }
 
     private final RootCallTarget callTarget;
-    @Child CallNode callNode = CallNode.create();
+    CallNode callNode = CallNode.create();
 
     AsyncHandler(PythonLanguage language) {
         callTarget = Truffle.getRuntime().createCallTarget(new CallRootNode(language));