Delete CPS IR

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

-// Method to test: function(test)
-import 'package:expect/expect.dart';
-
-// This example illustrates a case we wish to do better in terms of inlining and
-// code generation.
-//
-// Naively this function would be compiled without inlining Wrapper.[],
-// JSArray.[] and Wrapper.[]= because:
-// JSArray.[] is too big (14 nodes)
-// Wrapper.[] is too big if we force inlining of JSArray (15 nodes)
-// Wrapper.[]= is even bigger (46 nodes)
-//
-// We now do specialization of [] and []= by adding guards and injecting builtin
-// operators. This made it possible to inline []. We still don't see []= inlined
-// yet, that might require that we improve the inlining counting heuristics a
-// bit.
-@NoInline()
-test(data, x) {
-  data[x + 1] = data[x];
-}
-
-main() {
-  var wrapper = new Wrapper();
-  wrapper[33] = wrapper[1]; // make Wrapper.[]= and [] used more than once.
-  print(test(new Wrapper(), int.parse('2')));
-}
-
-class Wrapper {
-  final List arr = <bool>[true, false, false, true];
-  operator[](int i) => this.arr[i];
-  operator[]=(int i, v) {
-    if (i > arr.length - 1) arr.length = i + 1;
-    return arr[i] = v;
-  }
-}