Remove language directory.

dart/language/grammar/doit.sh

-#!/bin/bash
-# Copyright (c) 2011, 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.
-
-set -e
-
-make -q || make
-
-function listDartFiles() {
-  find "$@" \
-    \( -name xcodebuild -o -name out -o -name eclipse.workspace \) -prune -o \
-    -name \*.dart -print
-}
-
-# BUG(5275207): Update grammar instead of filtering out the
-# interpolation test.
-listDartFiles ../../runtime | \
-  grep -v NegativeTest | \
-  grep -v PrivateTest.dart | \
-  xargs java -jar out/dart.jar
-
-listDartFiles ../../corelib | \
-  grep -v NegativeTest | \
-  xargs java -jar out/dart.jar
-
-listDartFiles ../../compiler | \
-  grep -v Negative | \
-  xargs java -jar out/dart.jar
-
-# BUG(5275207): Update grammar instead of filtering out the
-# code that relies on fancy interpolation (Value.dart).
-listDartFiles ../../client | \
-  grep -v NegativeTest | \
-  grep -v Value.dart | \
-  xargs java -jar out/dart.jar
-
-listDartFiles ../../tests | \
-  grep -v NegativeTest | \
-  grep -v StaticTopLevelTest.dart | \
-  grep -v StringInterpolate2Test.dart | \
-  xargs java -jar out/dart.jar
-
-listDartFiles ../../samples | \
-  xargs java -jar out/dart.jar
-
-listDartFiles .. | \
-  grep -v NegativeTest | \
-  xargs java -jar out/dart.jar