Revert "K2/Java: add private enum constructor for MPP matching"

Review: https://jetbrains.team/p/kt/reviews/13368/timeline

This reverts commit 2cea2b9098.

Motivation:
KT-62961 was fixed independently by two different commits:
- ac3d8ad3ac
- 2cea2b9098

If possible, it's better not to introduce implicit declarations.
That's why it was agreed to keep
ac3d8ad3ac and revert
2cea2b9098

compiler/testData/diagnostics/tests/enum/inheritanceFromEnum.fir.kt

@@ -10,4 +10,4 @@ enum class MyEnum2() {}
 
 class MyClass(): <!FINAL_SUPERTYPE, INVISIBLE_REFERENCE!>MyEnum2<!>() {}
 
-class MyClass2(): <!FINAL_SUPERTYPE, INVISIBLE_REFERENCE!>MyJavaEnum<!>() {}
+class MyClass2(): <!FINAL_SUPERTYPE, UNRESOLVED_REFERENCE!>MyJavaEnum<!>() {}