remove gravtar compute function as we are not using it, this is done in the chat api

services/web/public/coffee/ide/chat/controllers/ChatMessageController.coffee

@@ -2,11 +2,6 @@ define [
 	"base"
 ], (App) ->
 	App.controller "ChatMessageController", ["$scope", "ide", ($scope, ide) ->
-		$scope.gravatarUrl = (user) ->
-			email = user.email.trim().toLowerCase()
-			hash = CryptoJS.MD5(email).toString()
-			return "//www.gravatar.com/avatar/#{hash}?d=mm&s=50"
-
 		$scope.hue = (user) ->
 			ide.onlineUsersManager.getHueForUserId(user.id)
 	]