Remove deferred browser process requires

src/browser/atom-application.coffee

@@ -273,9 +273,8 @@ class AtomApplication
     ipc.on 'cancel-window-close', =>
       @quitting = false
 
-    clipboard = null
+    clipboard = require '../safe-clipboard'
     ipc.on 'write-text-to-selection-clipboard', (event, selectedText) ->
-      clipboard ?= require '../safe-clipboard'
       clipboard.writeText(selectedText, 'selection')
 
   # Public: Executes the given command.

src/browser/atom-window.coffee

@@ -93,10 +93,9 @@ class AtomWindow
   hasProjectPath: -> @getLoadSettings().initialPaths?.length > 0
 
   setupContextMenu: ->
-    ContextMenu = null
+    ContextMenu = require './context-menu'
 
     @browserWindow.on 'context-menu', (menuTemplate) =>
-      ContextMenu ?= require './context-menu'
       new ContextMenu(menuTemplate, this)
 
   containsPaths: (paths) ->