Remove old warning code for wrong usage of warnings in co19

tools/testing/dart/test_suite.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 1515 matching lines @@
    * conformance to the Dart language. Any Dart implementation must
    * pass the co19 test suite as is, and not require extra flags,
    * environment variables, configuration files, etc.
    */
   Map readOptionsFromCo19File(Path filePath) {
     String contents = decodeUtf8(new File(filePath.toNativePath())
         .readAsBytesSync());
 
     bool hasCompileError = contents.contains("@compile-error");
     bool hasRuntimeError = contents.contains("@runtime-error");
-    bool hasDynamicTypeError = contents.contains("@dynamic-type-error");
     bool hasStaticWarning = contents.contains("@static-warning");
     bool isMultitest = multiTestRegExp.hasMatch(contents);
 
-    if (hasDynamicTypeError) {
-      // TODO(ahe): Remove this warning when co19 no longer uses this tag.
-
-      // @dynamic-type-error has been replaced by tests that use
-      // tests/co19/src/Utils/dynamic_check.dart to dynamically detect
-      // if a test is running in checked mode or not and change its
-      // expectations accordingly.
-
-      // Using stderr.writeString to avoid breaking dartc/junit_tests
-      // which parses the output of the --list option.
-      stderr.writeln(
-          "Warning: deprecated @dynamic-type-error tag used in $filePath");
-    }
-
     return {
       "vmOptions": <List>[[]],
       "sharedOptions": <String>[],
       "dartOptions": null,
       "packageRoot": null,
       "hasCompileError": hasCompileError,
       "hasRuntimeError": hasRuntimeError,
       "hasStaticWarning" : hasStaticWarning,
       "otherScripts": <String>[],
       "isMultitest": isMultitest,
@@ skipping 475 matching lines @@
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
  * $compileErrorSkip tests are skipped on browsers due to compile-time error
 """;
     print(report);
    }
 }