diff --git a/lib/shared/redux/client-db-utils.js b/lib/shared/redux/client-db-utils.js
--- a/lib/shared/redux/client-db-utils.js
+++ b/lib/shared/redux/client-db-utils.js
@@ -2,66 +2,17 @@
 
 import _keyBy from 'lodash/fp/keyBy.js';
 
-import {
-  threadStoreOpsHandlers,
-  type ClientDBThreadStoreOperation,
-  type ReplaceThreadOperation,
-  type ThreadStoreOperation,
-} from '../../ops/thread-store-ops.js';
+import type { ClientDBThreadStoreOperation } from '../../ops/thread-store-ops.js';
 import type {
   RawThreadInfos,
-  ThreadStore,
   ClientDBThreadInfo,
 } from '../../types/thread-types.js';
-import { entries, values } from '../../utils/objects.js';
+import { values } from '../../utils/objects.js';
 import {
   convertClientDBThreadInfoToRawThreadInfo,
   convertRawThreadInfoToClientDBThreadInfo,
 } from '../../utils/thread-ops-utils.js';
 
-function updateThreadStoreThreadInfos(
-  threadStore: ThreadStore,
-  migrationFunc: RawThreadInfos => RawThreadInfos,
-): {
-  +newThreadStore: ThreadStore,
-  +dbOperations: $ReadOnlyArray<ClientDBThreadStoreOperation>,
-} {
-  const rawThreadInfos = threadStore.threadInfos;
-
-  // 1. Convert `RawThreadInfo`s to a map of `threadID` => `threadInfo`.
-  const keyedRawThreadInfos = _keyBy('id')(rawThreadInfos);
-
-  // 2. Apply `migrationFunc` to `ThreadInfo`s.
-  const updatedKeyedRawThreadInfos = migrationFunc(keyedRawThreadInfos);
-
-  // 3. Construct `replace` `ThreadStoreOperation`s.
-  const replaceOps: $ReadOnlyArray<ReplaceThreadOperation> = entries(
-    updatedKeyedRawThreadInfos,
-  ).map(([id, threadInfo]) => ({
-    type: 'replace',
-    payload: { id, threadInfo },
-  }));
-
-  // 4. Prepend `replaceOps` with `remove_all` ops
-  const operations: $ReadOnlyArray<ThreadStoreOperation> = [
-    { type: 'remove_all' },
-    ...replaceOps,
-  ];
-
-  // 5. Process `ThreadStoreOperation`s to get new `ThreadStore`.
-  const newThreadStore: ThreadStore =
-    threadStoreOpsHandlers.processStoreOperations(threadStore, operations);
-
-  // 6. Convert `ThreadStoreOperation`s to `ClientDBThreadStoreOperation`s.
-  const dbOperations: $ReadOnlyArray<ClientDBThreadStoreOperation> =
-    threadStoreOpsHandlers.convertOpsToClientDBOps(operations);
-
-  return {
-    newThreadStore,
-    dbOperations,
-  };
-}
-
 function createUpdateDBOpsForThreadStoreThreadInfos(
   clientDBThreadInfos: $ReadOnlyArray<ClientDBThreadInfo>,
   migrationFunc: RawThreadInfos => RawThreadInfos,
@@ -95,7 +46,4 @@
   return [{ type: 'remove_all' }, ...replaceThreadOperations];
 }
 
-export {
-  updateThreadStoreThreadInfos,
-  createUpdateDBOpsForThreadStoreThreadInfos,
-};
+export { createUpdateDBOpsForThreadStoreThreadInfos };