Revert "Update iosched app to latest revision"

This reverts commit f58e5dddacc10c959ba6c6dfded3938129ac5e1b.

Reason for revert: This should be updated with a bundle

Change-Id: Id866d962ef4a3885fe5e6f9b6a17da2255e8819a
diff --git a/tools/run_on_as_app.py b/tools/run_on_as_app.py
index 42b7cae..6d6f0fe 100755
--- a/tools/run_on_as_app.py
+++ b/tools/run_on_as_app.py
@@ -200,7 +200,7 @@
   Repo({
       'name': 'iosched',
       'url': 'https://github.com/christofferqa/iosched.git',
-      'revision': '80cde8f24717f3afedff5098cd765a6a88cf9660',
+      'revision': '581cbbe2253711775dbccb753cdb53e7e506cb02',
       'apps': [
           App({
               'id': 'com.google.samples.apps.iosched',