Revert "Merge pull request #3825 from tw-yshuang/fix/delegated-child-session-early-failure-fallback"

This reverts commit cd33f3a397, reversing
changes made to 521c99cf0b.

src/hooks/runtime-fallback/last-user-retry-parts.ts

@@ -1,9 +1,7 @@
 import { extractSessionMessages } from "./session-messages"
-import { getDelegatedChildSessionBootstrap } from "../../shared/delegated-child-session-bootstrap"
 
 export function getLastUserRetryParts(
   messagesResponse: unknown,
-  sessionID?: string,
 ): Array<{ type: "text"; text: string }> {
   const messages = extractSessionMessages(messagesResponse)
   const lastUserMessage = messages?.filter((message) => message.info?.role === "user").pop()
@@ -11,7 +9,7 @@ export function getLastUserRetryParts(
     lastUserMessage?.parts
     ?? (lastUserMessage?.info?.parts as Array<{ type?: string; text?: string }> | undefined)
 
-  const retryParts = (lastUserParts ?? [])
+  return (lastUserParts ?? [])
     .filter(
       (part): part is { type: "text"; text: string } =>
         part.type === "text"
@@ -19,12 +17,4 @@ export function getLastUserRetryParts(
         && part.text.length > 0,
     )
     .map((part) => ({ type: "text" as const, text: part.text }))
-
-  if (retryParts.length > 0) {
-    return retryParts
-  }
-
-  return sessionID
-    ? (getDelegatedChildSessionBootstrap(sessionID)?.retryParts ?? [])
-    : []
 }