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

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

Index: pkg/front_end/lib/src/fasta/compiler_command_line.dart
diff --git a/pkg/front_end/lib/src/fasta/compiler_command_line.dart b/pkg/front_end/lib/src/fasta/compiler_command_line.dart
index 04a4b6c68ae8aee16f616cdd3aff285a5b3190ff..2af9e842f62f3fb0cff1a255e0bb9960d57fab63 100644
--- a/pkg/front_end/lib/src/fasta/compiler_command_line.dart
+++ b/pkg/front_end/lib/src/fasta/compiler_command_line.dart
@@ -155,11 +155,6 @@ Message computeUsage(String programName, bool verbose) {
       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;