Remove the "kompile" mode of running the front end.

pkg/front_end/lib/src/fasta/compiler_command_line.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.compiler_command_line;
 
 import 'dart:io' show exit;
 
 import 'command_line.dart' show CommandLine, deprecated_argumentError;
 
@@ skipping 137 matching lines @@
   switch (programName) {
     case "outline":
       summary =
           "Creates an outline of a Dart program in the Dill/Kernel IR format.";
       break;
 
     case "compile":
       summary = "Compiles a Dart program to the Dill/Kernel IR format.";
       break;
 
-    case "kompile":
-      summary =
-          "Compiles a Dart program to the Dill/Kernel IR format via dartk.";
-      break;
-
     case "run":
       summary = "Runs a Dart program.";
       break;
 
     case "compile_platform":
       summary = "Compiles Dart SDK platform to the Dill/Kernel IR format.";
       basicUsage = "Usage: $programName [options] patched_sdk fullOutput "
           "outlineOutput\n";
   }
   StringBuffer sb = new StringBuffer(basicUsage);
   if (summary != null) {
     sb.writeln();
     sb.writeln(summary);
     sb.writeln();
   }
   sb.write(options);
   // TODO(ahe): Don't use [templateUnspecified].
   return templateUnspecified.withArguments("$sb");
 }