Don't pass dummy arguments to java.lang.Enum when parsing Java

Since java.lang.Enum now pretends ot have an empty constructor, Java
trees should not pass any arguments to it either.

Author: odersky

compiler/src/dotty/tools/dotc/parsing/JavaParsers.scala

@@ -832,8 +832,7 @@ object JavaParsers {
         AppliedTypeTree(javaLangDot(tpnme.Enum), List(enumType))
         */
       val superclazz = Apply(TypeApply(
-        Select(New(javaLangDot(tpnme.Enum)), nme.CONSTRUCTOR), List(enumType)),
-        List(Literal(Constant(null)),Literal(Constant(0))))
+        Select(New(javaLangDot(tpnme.Enum)), nme.CONSTRUCTOR), List(enumType)), Nil)
       val enumclazz = atSpan(start, nameOffset) {
         TypeDef(name,
           makeTemplate(superclazz :: interfaces, body, List(), true)).withMods(mods | Flags.JavaEnum)