Language mode no longer uses Ace for anything

src/app/language-mode.coffee

@@ -1,4 +1,3 @@
-AceAdaptor = require 'ace-adaptor'
 Range = require 'range'
 TextMateBundle = require 'text-mate-bundle'
 _ = require 'underscore'
@@ -14,11 +13,7 @@ class LanguageMode
     "'": "'"
 
   constructor: (@editSession) ->
-    @buffer = @editSession.buffer
-    @aceMode = @requireAceMode()
-
     @grammar = TextMateBundle.grammarForFileName(@editSession.buffer.getBaseName())
-    @aceAdaptor = new AceAdaptor(@editSession)
 
     _.adviseBefore @editSession, 'insertText', (text) =>
       return true if @editSession.hasMultipleCursors()
@@ -34,19 +29,6 @@ class LanguageMode
         @editSession.moveCursorLeft()
         false
 
-  requireAceMode: (fileExtension) ->
-    modeName = switch @editSession.buffer.getExtension()
-      when 'js' then 'javascript'
-      when 'coffee' then 'coffee'
-      when 'rb', 'ru' then 'ruby'
-      when 'c', 'h', 'cpp' then 'c_cpp'
-      when 'html', 'htm' then 'html'
-      when 'css' then 'css'
-      when 'java' then 'java'
-      when 'xml' then 'xml'
-      else 'text'
-    new (require("ace/mode/#{modeName}").Mode)
-
   isOpenBracket: (string) ->
     @pairedCharacters[string]?