Java: update fixed test

java/ql/test/library-tests/dataflow/stream-read/A.java

@@ -99,7 +99,7 @@ public class A {
     }
 
     public static void testWrapCall() {
-        sink(wrapStream(null)); // $ SPURIOUS: hasTaintFlow
+        sink(wrapStream(null)); // no flow
         sink(wrapStream(source())); // $ hasTaintFlow
     }