Drop old enum syntax. Comma / semicolon are now a syntactic part of enum entry.

Comma must present now between enum entries, semicolon between last entry & first member, constructor calls must be without colons / specifiers.
A swarm of tests fixed accordingly.

idea/testData/inspections/cleanup/cleanup.kt

@@ -1,15 +1,6 @@
 trait Foo {
 }
 
-enum class E {
-    First Second
-}
-
-enum class F(val name: String) {
-    First: F("First")
-    Second: F("Second")
-}
-
 val f = { (a: Int, b: Int) -> a + b }
 
 class A private()

idea/testData/inspections/cleanup/cleanup.kt.after

@@ -1,15 +1,6 @@
 interface Foo {
 }
 
-enum class E {
-    First, Second
-}
-
-enum class F(val name: String) {
-    First("First"),
-    Second("Second")
-}
-
 val f = { a: Int, b: Int -> a + b }
 
 class A private constructor()