Remove dimension shims on window

spec/spec-helper.coffee

@@ -1,6 +1,6 @@
 require '../src/window'
 window.setUpEnvironment('spec')
-window.restoreDimensions()
+atom.restoreDimensions()
 
 require '../vendor/jasmine-jquery'
 path = require 'path'

src/window.coffee

@@ -47,7 +47,7 @@ window.startEditorWindow = ->
     installApmCommand()
 
   windowEventHandler = new WindowEventHandler
-  restoreDimensions()
+  atom.restoreDimensions()
   atom.config.load()
   atom.keymap.loadBundledKeymaps()
   atom.themes.loadBaseStylesheets()
@@ -94,12 +94,6 @@ window.deserializeEditorWindow = ->
   atom.deserializeRootView()
   window.rootView = atom.rootView
 
-window.getDimensions = -> atom.getDimensions()
-
-window.setDimensions = (args...) -> atom.setDimensions(args...)
-
-window.restoreDimensions = (args...) -> atom.restoreDimensions(args...)
-
 window.onerror = ->
   atom.openDevTools()