diff --git a/surfsense_web/atoms/tabs/migrate-tabs.test.ts b/surfsense_web/atoms/tabs/migrate-tabs.test.ts
deleted file mode 100644
index e0067a4d2..000000000
--- a/surfsense_web/atoms/tabs/migrate-tabs.test.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-import assert from "node:assert/strict";
-import { test } from "node:test";
-import { migrateLegacyTabs } from "./migrate-tabs";
-
-// Run with: pnpm exec tsx --test atoms/tabs/migrate-tabs.test.ts
-test("maps legacy searchSpaceId to workspaceId on read", () => {
-	const migrated = migrateLegacyTabs({
-		tabs: [{ id: "chat-new", type: "chat", searchSpaceId: 7 } as never],
-		activeTabId: "chat-new",
-	});
-	const tab = migrated.tabs[0] as { workspaceId?: number };
-	assert.equal(tab.workspaceId, 7);
-});
-
-test("leaves an already-migrated workspaceId untouched", () => {
-	const migrated = migrateLegacyTabs({
-		tabs: [{ id: "d1", type: "document", workspaceId: 3, searchSpaceId: 9 } as never],
-	});
-	const tab = migrated.tabs[0] as { workspaceId?: number };
-	assert.equal(tab.workspaceId, 3);
-});
diff --git a/surfsense_web/atoms/tabs/migrate-tabs.ts b/surfsense_web/atoms/tabs/migrate-tabs.ts
deleted file mode 100644
index e95a921de..000000000
--- a/surfsense_web/atoms/tabs/migrate-tabs.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
- * One-time read-migration for persisted tabs: legacy state stored the workspace
- * as `searchSpaceId`. Map it to `workspaceId` on read so already-open tabs keep
- * their workspace association after the rename. Pure + dependency-free so it can
- * be unit-checked without loading the atom module.
- */
-export function migrateLegacyTabs<T extends { tabs: Array<{ workspaceId?: number }> }>(
-	state: T
-): T {
-	return {
-		...state,
-		tabs: state.tabs.map((t) => {
-			const legacy = t as { workspaceId?: number; searchSpaceId?: number };
-			return legacy.workspaceId === undefined && legacy.searchSpaceId !== undefined
-				? { ...t, workspaceId: legacy.searchSpaceId }
-				: t;
-		}),
-	};
-}