Fix ConstantValue-related testData for lightClasses tests

TODO support custom language version settings for lightClasses tests

compiler/testData/asJava/lightClasses/publicField/Simple.java

@@ -1,7 +1,7 @@
 public final class C {
     @kotlin.jvm.JvmField
     @org.jetbrains.annotations.NotNull
-    public final java.lang.String foo = "A";
+    public final java.lang.String foo;
 
     public C() { /* compiled code */ }
 }