[gnome-ostree] task: Remove unused allowNone functionality

[Jasper St. Pierre <jstpierre src gnome org>]

commit 33276abfea35a0aff83c19879f68d103ca15f3c4
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Jun 13 17:40:59 2013 -0400

    task: Remove unused allowNone functionality

 src/js/task.js |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/src/js/task.js b/src/js/task.js
index f3f8707..0f00c84 100644
--- a/src/js/task.js
+++ b/src/js/task.js
@@ -60,17 +60,14 @@ const TaskSet = new Lang.Class({
        return this._tasks;
     },
 
-    getTask: function(taskName, params) {
-       params = Params.parse(params, { allowNone: false })
+    getTask: function(taskName) {
        for (let i = 0; i < this._tasks.length; i++) {
            let taskDef = this._tasks[i];
-            let curName = taskDef.prototype.TaskName
+            let curName = taskDef.prototype.TaskName;
            if (curName == taskName)
                return taskDef;
        }
-       if (!params.allowNone)
-           throw new Error("No task definition matches " + taskName);
-       return null;
+       throw new Error("No task definition matches " + taskName);
     },
 
     getTasksAfter: function(taskName) {