diff --git a/cloudinit/config/cc_bootcmd.py b/cloudinit/config/cc_bootcmd.py
index 233da1ef..9a880ecb 100644
--- a/cloudinit/config/cc_bootcmd.py
+++ b/cloudinit/config/cc_bootcmd.py
@@ -20,12 +20,6 @@ from cloudinit import util
frequency = PER_ALWAYS
-# The schema definition for each cloud-config module is a strict contract for
-# describing supported configuration parameters for each cloud-config section.
-# It allows cloud-config to validate and alert users to invalid or ignored
-# configuration options before actually attempting to deploy with said
-# configuration.
-
distros = ['all']
schema = {
diff --git a/cloudinit/config/cc_ntp.py b/cloudinit/config/cc_ntp.py
index 15ae1ecd..67e7b48a 100644
--- a/cloudinit/config/cc_ntp.py
+++ b/cloudinit/config/cc_ntp.py
@@ -26,12 +26,6 @@ NR_POOL_SERVERS = 4
distros = ['centos', 'debian', 'fedora', 'opensuse', 'ubuntu']
-# The schema definition for each cloud-config module is a strict contract for
-# describing supported configuration parameters for each cloud-config section.
-# It allows cloud-config to validate and alert users to invalid or ignored
-# configuration options before actually attempting to deploy with said
-# configuration.
-
schema = {
'id': 'cc_ntp',
'name': 'NTP',
diff --git a/cloudinit/config/cc_runcmd.py b/cloudinit/config/cc_runcmd.py
index 7f995693..1203c4bc 100644
--- a/cloudinit/config/cc_runcmd.py
+++ b/cloudinit/config/cc_runcmd.py
@@ -16,13 +16,6 @@ from cloudinit import util
import os
from textwrap import dedent
-
-# The schema definition for each cloud-config module is a strict contract for
-# describing supported configuration parameters for each cloud-config section.
-# It allows cloud-config to validate and alert users to invalid or ignored
-# configuration options before actually attempting to deploy with said
-# configuration.
-
distros = ['all']
schema = {
diff --git a/cloudinit/config/schema.py b/cloudinit/config/schema.py
index c17d973e..198eae17 100644
--- a/cloudinit/config/schema.py
+++ b/cloudinit/config/schema.py
@@ -1,5 +1,12 @@
# This file is part of cloud-init. See LICENSE file for license information.
-"""schema.py: Set of module functions for processing cloud-config schema."""
+"""schema.py: Set of module functions for processing cloud-config schema.
+
+The schema definition for each cloud-config module is a strict contract for
+describing supported configuration parameters for each cloud-config section.
+It allows cloud-config to validate and alert users to invalid or ignored
+configuration options before actually attempting to deploy with said
+configuration.
+"""
from __future__ import print_function