Revert "Moblab: Servo Support via Host Attributes."

This reverts commit 71f190bc31be36311c1c59d762a13a28754d7ea9.

Reverting as the db migration does not work on systems that have not touched the afe at all.

Change-Id: I0c6875ec17f9362b7e646471b6ae5d06c70b770d
Reviewed-on: https://chromium-review.googlesource.com/255350
Reviewed-by: Simran Basi <sbasi@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
diff --git a/cli/host_unittest.py b/cli/host_unittest.py
index a9bdd90..33a2103 100755
--- a/cli/host_unittest.py
+++ b/cli/host_unittest.py
@@ -622,8 +622,7 @@
                               u'synch_id': None,
                               u'shard': None,
                               u'platform': u'plat1',
-                              u'id': 3,
-                              u'attributes': {}}]),
+                              u'id': 3}]),
                            ('get_hosts', {'hostname': 'host0'},
                             True,
                             [{u'status': u'Ready',
@@ -637,8 +636,7 @@
                               u'shard': None,
                               u'synch_id': None,
                               u'platform': u'plat0',
-                              u'id': 2,
-                              u'attributes': {}}]),
+                              u'id': 2}]),
                            ('get_acl_groups', {'hosts__hostname': 'host1'},
                             True,
                             [{u'description': u'',
@@ -699,8 +697,7 @@
                               u'invalid': False,
                               u'synch_id': None,
                               u'platform': u'plat0',
-                              u'id': 2,
-                              u'attributes': {}}]),
+                              u'id': 2}]),
                            ('get_acl_groups', {'hosts__hostname': 'host0'},
                             True,
                             [{u'description': u'',
@@ -750,8 +747,7 @@
                               u'invalid': False,
                               u'synch_id': None,
                               u'platform': u'plat0',
-                              u'id': 2,
-                              u'attributes': {}}]),
+                              u'id': 2}]),
                            ('get_acl_groups', {'hosts__hostname': 'host0'},
                             True,
                             [{u'description': u'',
@@ -799,8 +795,7 @@
                               u'invalid': False,
                               u'synch_id': None,
                               u'platform': u'plat1',
-                              u'id': 3,
-                              u'attributes': {}},
+                              u'id': 3},
                             {u'status': u'Ready',
                               u'hostname': u'host0',
                               u'locked': False,
@@ -811,8 +806,7 @@
                               u'invalid': False,
                               u'synch_id': None,
                               u'platform': u'plat0',
-                              u'id': 2,
-                              u'attributes': {}}]),
+                              u'id': 2}]),
                            ('get_acl_groups', {'hosts__hostname': 'host1'},
                             True,
                             [{u'description': u'',
@@ -871,8 +865,7 @@
                               u'invalid': False,
                               u'synch_id': None,
                               u'platform': u'plat0',
-                              u'id': 5,
-                              u'attributes': {}}]),
+                              u'id': 5}]),
                            ('get_hosts', {'hostname__startswith': 'ho'},
                             True,
                             [{u'status': u'Ready',
@@ -885,8 +878,7 @@
                               u'invalid': False,
                               u'synch_id': None,
                               u'platform': u'plat1',
-                              u'id': 3,
-                              u'attributes': {}},
+                              u'id': 3},
                             {u'status': u'Ready',
                               u'hostname': u'host0',
                               u'locked': False,
@@ -897,8 +889,7 @@
                               u'invalid': False,
                               u'synch_id': None,
                               u'platform': u'plat0',
-                              u'id': 2,
-                              u'attributes': {}}]),
+                              u'id': 2}]),
                            ('get_acl_groups', {'hosts__hostname': 'newhost0'},
                             True,
                             [{u'description': u'',