diff --git a/extensions/migrate-claude/helpers.ts b/extensions/migrate-claude/helpers.ts
index c47cdd44c7b..a93339f2617 100644
--- a/extensions/migrate-claude/helpers.ts
+++ b/extensions/migrate-claude/helpers.ts
@@ -80,17 +80,6 @@ export function childRecord(
   return isRecord(value) ? value : {};
 }
 
-export function readString(value: unknown): string | undefined {
-  return typeof value === "string" && value.trim() ? value.trim() : undefined;
-}
-
-export function readStringArray(value: unknown): string[] {
-  if (!Array.isArray(value)) {
-    return [];
-  }
-  return value.filter((entry): entry is string => typeof entry === "string" && entry.trim() !== "");
-}
-
 export async function appendItem(item: MigrationItem): Promise<MigrationItem> {
   if (!item.source || !item.target) {
     return markMigrationItemError(item, MIGRATION_REASON_MISSING_SOURCE_OR_TARGET);