diff --git a/css/base/ckeditor.css b/css/base/ckeditor.css
deleted file mode 100644
index 77ec01c..0000000
--- a/css/base/ckeditor.css
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
-  @file Styles for the ckeditor.
-*/
-
-/* Alerts */
-.cke_editable .alert {
-  padding: 2.5rem;
-  font-size: 1.3125rem;
-  font-weight: bold;
-}
-
-.alert {
-  border: 5px solid black;
-  background-color: white;
-}
-
-.alert-primary {
-  border-color: #652c95;
-}
-
-.alert-info {
-  border-color: #297bbb;
-}
-
-.alert-danger {
-  border-color: #e4251b;
-}
-
-.alert-fail {
-  border-color: #ed7522;
-}
-
-.alert-success {
-  border-color: #048a04;
-}
-
-/* Links */
-.btn.btn-start {
-  padding: 0.5rem 1rem;
-  color: white;
-  border: 1px solid #048a04;
-  background-color: #048a04;
-}
-
-.btn.btn-start:focus,
-.btn.btn-start:hover {
-  color: #048a04;
-  background-color: white;
-}
-
-.btn.btn-start::after {
-  top: -2px;
-  margin-inline-start: 0.5rem;
-  content: "\203A";
-  font-size: 2.875rem;
-}
-
-.external-link::after {
-  background-color: #652c95;
-}
-
-.list-checked li::marker {
-  content: "\2714\0020";
-  color: #048a04;
-}
-
-/* Call out */
-.callout {
-  color: white;
-  font-size: 1.3125rem;
-}
-
-.callout a {
-  color: white;
-}
-.callout a:focus {
-  color: white;
-  background-color: #505a5f;
-}
-
-.callout-primary {
-  background-color: #652c95;
-}
-
-.callout-success {
-  background-color: #048a04;
-}
-
-.callout-danger {
-  background-color: #e4251b;
-}
-
-.callout-teal {
-  background-color: teal;
-}
-
-.callout-carbon {
-  background-color: #505a5f;
-}
-
-.callout-yellow,
-.callout-yellow a {
-  color: #505a5f;
-  background-color: #fd0;
-}
diff --git a/localgov_base.info.yml b/localgov_base.info.yml
index b9d499f..e4fc1d9 100644
--- a/localgov_base.info.yml
+++ b/localgov_base.info.yml
@@ -3,8 +3,6 @@ description: "Base theme for LocalGov Drupal sites."
 type: theme
 core_version_requirement: ^10.1.3 || ^11
 base theme: "stable9"
-ckeditor_stylesheets:
-  - css/base/ckeditor.css
 ckeditor5-stylesheets:
   - css/base/ckeditor5.css