Remove obsolete reference to ansi_up typings.

packages/metapackage/src/typings.d.ts

@@ -4,7 +4,6 @@
 /// <reference path="../../codemirror/typings/codemirror/codemirror.d.ts"/>
 /// <reference path="../../coreutils/typings/path-posix/path-posix.d.ts"/>
 /// <reference path="../../coreutils/typings/url-parse/url-parse.d.ts"/>
-/// <reference path="../../rendermime/typings/ansi_up/ansi_up.d.ts"/>
 /// <reference path="../../terminal/src/xterm.d.ts"/>
 /// <reference path="../../vdom-extension/src/transform-vdom.d.ts"/>