diff --git a/js/read_syncs.js b/js/read_syncs.js
deleted file mode 100644
index e739de3c3..000000000
--- a/js/read_syncs.js
+++ /dev/null
@@ -1,89 +0,0 @@
-/* global
-  Backbone,
-  Whisper,
-*/
-
-/* eslint-disable more/no-then */
-
-// eslint-disable-next-line func-names
-(function() {
-  'use strict';
-
-  window.Whisper = window.Whisper || {};
-  Whisper.ReadSyncs = new (Backbone.Collection.extend({
-    forMessage(message) {
-      const receipt = this.findWhere({
-        sender: message.get('source'),
-        timestamp: message.get('sent_at'),
-      });
-      if (receipt) {
-        window.log.info('Found early read sync for message');
-        this.remove(receipt);
-        return receipt;
-      }
-
-      return null;
-    },
-    async onReceipt(receipt) {
-      try {
-        const messages = await window.Signal.Data.getMessagesBySentAt(receipt.get('timestamp'));
-
-        const found = messages.find(
-          item => item.isIncoming() && item.get('source') === receipt.get('sender')
-        );
-        const notificationForMessage = found
-          ? Whisper.Notifications.findWhere({ messageId: found.id })
-          : null;
-        const removedNotification = Whisper.Notifications.remove(notificationForMessage);
-        const receiptSender = receipt.get('sender');
-        const receiptTimestamp = receipt.get('timestamp');
-        const wasMessageFound = Boolean(found);
-        const wasNotificationFound = Boolean(notificationForMessage);
-        const wasNotificationRemoved = Boolean(removedNotification);
-        window.log.info('Receive read sync:', {
-          receiptSender,
-          receiptTimestamp,
-          wasMessageFound,
-          wasNotificationFound,
-          wasNotificationRemoved,
-        });
-
-        if (!found) {
-          return;
-        }
-
-        const readAt = receipt.get('read_at');
-
-        // If message is unread, we mark it read. Otherwise, we update the expiration
-        //   timer to the time specified by the read sync if it's earlier than
-        //   the previous read time.
-        if (found.isUnread() && window.isFocused()) {
-          await found.markRead(readAt);
-
-          // onReadMessage may result in messages older than this one being
-          //   marked read. We want those messages to have the same expire timer
-          //   start time as this one, so we pass the readAt value through.
-          const conversation = found.getConversation();
-          if (conversation) {
-            conversation.onReadMessage(found, readAt);
-          }
-        } else {
-          const now = Date.now();
-          const existingTimestamp = found.get('expirationStartTimestamp');
-          const expirationStartTimestamp = Math.min(
-            now,
-            Math.min(existingTimestamp || now, readAt || now)
-          );
-          found.set({ expirationStartTimestamp });
-
-          const force = true;
-          await found.setToExpire(force);
-        }
-
-        this.remove(receipt);
-      } catch (error) {
-        window.log.error('ReadSyncs.onReceipt error:', error && error.stack ? error.stack : error);
-      }
-    },
-  }))();
-})();
diff --git a/ts/receiver/queuedJob.ts b/ts/receiver/queuedJob.ts
index b413c83a9..cf8aa8d8b 100644
--- a/ts/receiver/queuedJob.ts
+++ b/ts/receiver/queuedJob.ts
@@ -149,17 +149,7 @@ function handleMentions(
 }
 
 function updateReadStatus(message: MessageModel, conversation: ConversationModel) {
-  const readSync = window.Whisper.ReadSyncs.forMessage(message);
-  if (readSync) {
-    const shouldExpire = message.get('expireTimer');
-    const alreadyStarted = message.get('expirationStartTimestamp');
-    if (shouldExpire && !alreadyStarted) {
-      // Start message expiration timer
-      const start = Math.min(readSync.get('read_at'), Date.now());
-      message.set('expirationStartTimestamp', start);
-    }
-  }
-  if (readSync || message.isExpirationTimerUpdate()) {
+  if (message.isExpirationTimerUpdate()) {
     message.set({ unread: 0 });
 
     // This is primarily to allow the conversation to mark all older