Remove code associated with the old "kompile" functionality.

pkg/front_end/testcases/rasta/issue_000067.dart.dartk.expect

-library;
-import self as self;
-import "dart:core" as core;
-import "package:expect/expect.dart" as exp;
-
-class A extends core::Object {
-  constructor •() → dynamic
-    : super core::Object::•() {}
-  static factory foo() → self::A
-    invalid-statement;
-  method m() → core::int {}
-}
-class C extends self::A {
-  constructor •() → dynamic
-    : super self::A::•() {}
-  static factory bar() → self::C
-    invalid-statement;
-  method m() → core::int {
-    return 1;
-  }
-}
-class D extends self::C {
-  constructor •() → self::D
-    : super self::C::•();
-  method m() → core::int {
-    return 2;
-  }
-}
-static method main() → dynamic {
-  self::A a = new self::D::•();
-  exp::Expect::equals(2, a.m());
-}