diff --git a/packages/runtime-common/realm.ts b/packages/runtime-common/realm.ts
index 20bb559aa3..1c5d9af36e 100644
--- a/packages/runtime-common/realm.ts
+++ b/packages/runtime-common/realm.ts
@@ -45,7 +45,6 @@ import {
   fileContentToText,
   readFileAsText,
   getFileWithFallbacks,
-  writeToStream,
   waitForClose,
   type TextFileRef,
 } from './stream';
@@ -2147,14 +2146,6 @@ export interface CardDefinitionResource {
   };
 }
 
-function sseToChunkData(type: string, data: string, id?: string): string {
-  let info = [`event: ${type}`, `data: ${data}`];
-  if (id) {
-    info.push(`id: ${id}`);
-  }
-  return info.join('\n') + '\n\n';
-}
-
 function assertRealmPermissions(
   realmPermissions: any,
 ): asserts realmPermissions is RealmPermissions {