diff --git a/extensions/diffs/src/render.ts b/extensions/diffs/src/render.ts
index 3788a31f382..3a8e61a7024 100644
--- a/extensions/diffs/src/render.ts
+++ b/extensions/diffs/src/render.ts
@@ -14,7 +14,6 @@ import { VIEWER_LOADER_PATH } from "./viewer-assets.js";
 const DEFAULT_FILE_NAME = "diff.txt";
 const MAX_PATCH_FILE_COUNT = 128;
 const MAX_PATCH_TOTAL_LINES = 120_000;
-ensurePierreThemesRegistered();
 
 function escapeCssString(value: string): string {
   return value.replaceAll("\\", "\\\\").replaceAll('"', '\\"');