Remove Warning

[alvincrisuy]

• [x] I've read and understood the Contributing guidelines and have done my best effort to follow them.
• [x] I've read and agree to the Code of Conduct.
• [x] I've searched for any related issues and avoided creating a duplicate issue.

Description

Showing a warning while building

Reproducible in:

• [ ] This is reproducible in the sample project. SlackTextViewController version: iOS version(s): Device(s):

Steps to reproduce:

1. Install using cocoapods
2. Run Project

Expected result:

No warning

Actual result:

Showing a warning

Attachments:

e.g. Logs, screenshots, screencast, sample project, funny gif, etc.