Delete CPS IR

tests/compiler/dart2js/cps_ir/expected/operators_4.js

-// Expectation for test: 
-// var x = 1;
-// get foo => ++x > 10;
-// main() { print(foo && foo); }
-
-function() {
-  var v0 = $.x + 1, line;
-  $.x = v0;
-  if (v0 > 10) {
-    $.x = v0 = $.x + 1;
-    v0 = v0 > 10;
-  } else
-    v0 = false;
-  line = H.S(v0);
-  if (typeof dartPrint == "function")
-    dartPrint(line);
-  else if (typeof console == "object" && typeof console.log != "undefined")
-    console.log(line);
-  else if (!(typeof window == "object")) {
-    if (!(typeof print == "function"))
-      throw "Unable to print message: " + String(line);
-    print(line);
-  }
-}