diff --git a/src/agents/pi-embedded-runner/google-prompt-cache.ts b/src/agents/pi-embedded-runner/google-prompt-cache.ts
index b18297c49a0..09ae3583a29 100644
--- a/src/agents/pi-embedded-runner/google-prompt-cache.ts
+++ b/src/agents/pi-embedded-runner/google-prompt-cache.ts
@@ -68,10 +68,6 @@ type GooglePromptCacheDeps = {
   now?: () => number;
 };
 
-type GooglePromptCacheStreamOptions = {
-  cachedContent?: string;
-};
-
 function resolveGooglePromptCacheTtl(cacheRetention: CacheRetention): string {
   return cacheRetention === "long" ? "3600s" : "300s";
 }