Silly me, we don't need the extra class

Author: philwareham

src/assets/sass/modules/_lists.scss

@@ -136,20 +136,18 @@ dd {
  * <ol class="list--tree">
  */
 
-.list--tree {
-    font-family: $font-code;
-    font-size: $code-font-size;
-    line-height: $line-height-mobile;
-    font-feature-settings: normal; /* 1 */
-}
-
 .list--tree,
 .list--tree ol,
 .list--tree ul {
     list-style: none;
 }
 
-.list--tree:not(.flat) {
+.list--tree {
+    font-family: $font-code;
+    font-size: $code-font-size;
+    line-height: $line-height-mobile;
+    font-feature-settings: normal; /* 1 */
+
     ol,
     ul {
         position: relative;