Revert "Expect the Default tmpfs in platform_FilePerms"

This reverts commit 2d8ab02ecab6b50f01326ec84a63aeefc36f9fae.

We're taking away the tmpfs on /home/chronos/Default, at least
temporarily.

BUG=chromium:297666
TEST=run this test with dependent change landed; it should succeed.
CQ-DEPEND=If60df4b202e7f05961476adf06d01d7dc59d6efd

Change-Id: Iba246df93bc98af4c4339cf396317aca83846450
(cherry picked from commit c8669244f0861a9fd54906962fcbaad9633cf544)
Reviewed-on: https://chromium-review.googlesource.com/171662
Reviewed-by: Chris Masone <cmasone@chromium.org>
Commit-Queue: Chris Masone <cmasone@chromium.org>
Tested-by: Chris Masone <cmasone@chromium.org>
diff --git a/client/site_tests/platform_FilePerms/platform_FilePerms.py b/client/site_tests/platform_FilePerms/platform_FilePerms.py
index 31279de..fbba78a 100644
--- a/client/site_tests/platform_FilePerms/platform_FilePerms.py
+++ b/client/site_tests/platform_FilePerms/platform_FilePerms.py
@@ -39,8 +39,6 @@
         '/dev/shm': {'type': 'tmpfs', 'options': standard_rw_options},
         '/home': {'type': 'ext4', 'options': standard_rw_options},
         '/home/chronos': {'type': 'ext4', 'options': standard_rw_options},
-        '/home/chronos/Default': {
-            'type': 'tmpfs', 'options': standard_rw_options + ['mode=700']},
         '/media': {'type': 'tmpfs', 'options': standard_rw_options},
         '/mnt/stateful_partition': {
             'type': 'ext4',