[checkout] Remove checkout module properties

Bug: 43387
Change-Id: Id562da3006b68b225b199dd3cf8fd201b9756b5b
diff --git a/recipe_modules/checkout/__init__.py b/recipe_modules/checkout/__init__.py
index c003b18..ff5319c 100644
--- a/recipe_modules/checkout/__init__.py
+++ b/recipe_modules/checkout/__init__.py
@@ -20,43 +20,3 @@
 
 from recipe_engine.recipe_api import Property
 from recipe_engine.config import List
-
-PROPERTIES = {
-    'checkout.project':
-        Property(
-            param_name='project',
-            kind=str,
-            help='Jiri remote manifest project',
-            default=None),
-    'checkout.manifest':
-        Property(
-            param_name='manifest',
-            kind=str,
-            help='Jiri manifest to use',
-            default=None),
-    'checkout.remote':
-        Property(
-            param_name='remote',
-            kind=str,
-            help='Remote manifest repository',
-            default=None),
-    'checkout.attributes':
-        Property(
-            param_name='attributes',
-            kind=List(str),
-            help='Attributes corresponding to optional packages or projects to checkout',
-            default=()),
-    'checkout.use_snapshot':
-        Property(
-            param_name='use_snapshot',
-            kind=bool,
-            help='Whether or not to checkout from a Jiri snapshot.'
-            ' Snapshot is expected to be found at revision in repository.',
-            default=False),
-    'checkout.is_release_version':
-        Property(
-            param_name='is_release_version',
-            kind=bool,
-            help='Whether or not checkout is a release version.',
-            default=False),
-}