diff --git a/core/modules/outside_in/outside_in.libraries.yml.orig b/core/modules/outside_in/outside_in.libraries.yml.orig
deleted file mode 100644
index 06e24a8291..0000000000
--- a/core/modules/outside_in/outside_in.libraries.yml.orig
+++ /dev/null
@@ -1,45 +0,0 @@
-drupal.outside_in:
-  version: VERSION
-  js:
-    js/outside_in.js: {}
-  css:
-    component:
-      css/outside_in.module.css: {}
-      css/outside_in.motion.css: {}
-      css/outside_in.toolbar.css: {}
-    theme:
-      # @todo Set the group higher than CSS_AGGREGATE_THEME so that it overrides
-      #   both jQuery UI and Classy's dialog.css, remove in
-      #   https://www.drupal.org/node/1945262.
-      css/outside_in.theme.css: { group: 200 }
-  dependencies:
-    - core/jquery
-    - core/drupal
-    - core/jquery.once
-    - core/drupal.ajax
-drupal.off_canvas:
-  version: VERSION
-  js:
-    js/off-canvas.js: {}
-  css:
-    base:
-      css/off-canvas.reset.css: {}
-      css/off-canvas.base.css: {}
-      css/off-canvas.css: {}
-      css/off-canvas.theme.css: { group: 200 }
-    component:
-      css/off-canvas.motion.css: {}
-      css/off-canvas.button.css: {}
-      css/off-canvas.form.css: {}
-      css/off-canvas.table.css: {}
-      css/off-canvas.details.css: {}
-      css/off-canvas.tabledrag.css: {}
-      css/off-canvas.dropbutton.css: {}
-
-  dependencies:
-    - core/jquery
-    - core/drupal
-    - core/drupal.ajax
-    - core/drupal.announce
-    - core/drupal.dialog
-    - core/drupal.dialog.ajax
diff --git a/core/modules/outside_in/outside_in.libraries.yml.rej b/core/modules/outside_in/outside_in.libraries.yml.rej
deleted file mode 100644
index 1d071b93c7..0000000000
--- a/core/modules/outside_in/outside_in.libraries.yml.rej
+++ /dev/null
@@ -1,20 +0,0 @@
-***************
-*** 20,33 ****
-      - core/drupal
-      - core/jquery.once
-      - core/drupal.ajax
-- drupal.off_canvas:
--   version: VERSION
--   js:
--     js/off-canvas.js: {}
--   dependencies:
--     - core/jquery
--     - core/drupal
--     - core/drupal.ajax
--     - core/drupal.announce
--     - core/drupal.dialog
--     - core/drupal.dialog.ajax
---- 20,22 ----
-      - core/drupal
-      - core/jquery.once
-      - core/drupal.ajax
diff --git a/core/themes/stable/stable.info.yml b/core/themes/stable/stable.info.yml
index 3735ae19a9..1e437f9d4c 100644
--- a/core/themes/stable/stable.info.yml
+++ b/core/themes/stable/stable.info.yml
@@ -60,18 +60,18 @@ libraries-override:
   core/drupal.dialog.off_canvas:
     css:
       base:
-        misc/dialog/css/off-canvas.reset.css: css/core/dialog/off-canvas.reset.css
-        misc/dialog/css/off-canvas.base.css: css/core/dialog/off-canvas.base.css
-        misc/dialog/css/off-canvas.css: css/core/dialog/off-canvas.css
-        misc/dialog/css/off-canvas.theme.css: css/core/dialog/off-canvas.theme.css
+        misc/dialog/off-canvas.reset.css: css/core/dialog/off-canvas.reset.css
+        misc/dialog/off-canvas.base.css: css/core/dialog/off-canvas.base.css
+        misc/dialog/off-canvas.css: css/core/dialog/off-canvas.css
+        misc/dialog/off-canvas.theme.css: css/core/dialog/off-canvas.theme.css
       component:
-        misc/dialog/css/off-canvas.motion.css: css/core/dialog/off-canvas.motion.css
-        misc/dialog/css/off-canvas.button.css: css/core/dialog/off-canvas.button.css
-        misc/dialog/css/off-canvas.form.css: css/core/dialog/off-canvas.form.css
-        misc/dialog/css/off-canvas.table.css: css/core/dialog/off-canvas.table.css
-        misc/dialog/css/off-canvas.details.css: css/core/dialog/off-canvas.details.css
-        misc/dialog/css/off-canvas.tabledrag.css: css/core/dialog/off-canvas.tabledrag.css
-        misc/dialog/css/off-canvas.dropbutton.css: css/core/dialog/off-canvas.dropbutton.css
+        misc/dialog/off-canvas.motion.css: css/core/dialog/off-canvas.motion.css
+        misc/dialog/off-canvas.button.css: css/core/dialog/off-canvas.button.css
+        misc/dialog/off-canvas.form.css: css/core/dialog/off-canvas.form.css
+        misc/dialog/off-canvas.table.css: css/core/dialog/off-canvas.table.css
+        misc/dialog/off-canvas.details.css: css/core/dialog/off-canvas.details.css
+        misc/dialog/off-canvas.tabledrag.css: css/core/dialog/off-canvas.tabledrag.css
+        misc/dialog/off-canvas.dropbutton.css: css/core/dialog/off-canvas.dropbutton.css
 
   core/drupal.dropbutton:
     css: