Delete CPS IR

pkg/compiler/lib/src/dart2js.dart

Index: pkg/compiler/lib/src/dart2js.dart
diff --git a/pkg/compiler/lib/src/dart2js.dart b/pkg/compiler/lib/src/dart2js.dart
index 6c3c019d6b49194ead26a94f5a2c3edd32ec566f..e90f8d8dd97af4d78eaf4b87573c8820e291baa2 100644
--- a/pkg/compiler/lib/src/dart2js.dart
+++ b/pkg/compiler/lib/src/dart2js.dart
@@ -318,7 +318,6 @@ Future<api.CompilationResult> compile(List<String> argv) {
     new OptionHandler(
         '--output-type=dart|--output-type=dart-multi|--output-type=js',
         setOutputType),
-    new OptionHandler(Flags.useCpsIr, passThrough),
     new OptionHandler(Flags.noFrequencyBasedMinification, passThrough),
     new OptionHandler(Flags.verbose, setVerbose),
     new OptionHandler(Flags.version, (_) => wantVersion = true),
@@ -686,9 +685,6 @@ be removed in a future version:
     Generates output even if the program contains compile-time errors. Use the
     exit code to determine if compilation failed.
 
-  --use-cps-ir
-    Experimental.  Use the new CPS based backend for code generation.
-
   --no-frequency-based-minification
     Experimental.  Disabled the new frequency based minifying namer and use the
     old namer instead.