Remove code associated with the old "kompile" functionality.

pkg/front_end/testcases/rasta/class_hierarchy.dart.dartk.expect

-library;
-import self as self;
-import "dart:core" as core;
-
-class A extends core::Object {
-  constructor •() → self::A
-    : invalid-initializer;
-}
-class B extends core::Object {
-  constructor •() → self::B
-    : invalid-initializer;
-}
-class C extends core::Object {
-  constructor •() → dynamic
-    : invalid-initializer;
-}
-class D extends core::Object {
-  static factory •() → self::D
-    invalid-statement;
-}
-static method main() → void {
-  new self::A::•();
-  new self::B::•();
-  new self::C::•();
-  invalid-expression.call();
-}