Remove Page Caching comment from Page Source

When Hummingbird Page Caching is enabled, Page source adding this message

<!-- This page is cached by the Hummingbird Performance plugin v1.9.2 - https://wordpress.org/plugins/hummingbird-performance/. -->

This line says that the site is installed on WordPress, which I am trying to hide. Please advise is there is a way to not add this comment line to the source code?