Delete CPS IR

tests/compiler/dart2js/cps_ir/input/argument_refinement_28.dart

Index: tests/compiler/dart2js/cps_ir/input/argument_refinement_28.dart
diff --git a/tests/compiler/dart2js/cps_ir/input/argument_refinement_28.dart b/tests/compiler/dart2js/cps_ir/input/argument_refinement_28.dart
deleted file mode 100644
index cbea9617342517c39a686dc2019c9b34d54bf1c3..0000000000000000000000000000000000000000
--- a/tests/compiler/dart2js/cps_ir/input/argument_refinement_28.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-import 'dart:math';
-main() {
-  var x = int.parse('3');
-  var y = int.parse('1234');
-  var z = int.parse('1236');
-  var w = int.parse('2');
-  print(x is num);
-  print(sin(x));
-  print(x is num);
-
-  print(y is num);
-  print(log(y));
-  print(y is num);
-
-  print(z is num);
-  print(w is num);
-  print(pow(z, w));
-  print(z is num);
-  print(w is num);
-}