First announced back in July 2017, Adobe Flash has finally reached its' end of life. As of December 31, 2020 downloads of the Flash player, as well as (presumably) any other Flash-related tools, will be removed from the Adobe websites. As of January 12, 2021, Adobe Flash Player will be disabled by default as well. Any versions that are older than KB4561600 (which was released in June 2020) will be blocked and no longer function on their own. With Flash support ending, it will begin disappearing from web browsers, websites, and applications.
Even though many browsers will continue to disable Flash Player after the EOL Date and Adobe will block Flash content from running in Flash Player beginning January 12, 2021, Adobe began taking steps to help further secure users' systems by prompting them to uninstall Flash Player starting in October 2020.
To help secure users’ systems, Adobe strongly recommends removing unused components promptly. However, enterprise administrators can suppress Flash Player uninstall prompts by setting preferences available in the Flash Player configuration files. If you choose to suppress the uninstall prompt, this is entirely at the user’s own risk. Full details on the uninstall prompt settings and uninstalling Flash Player can be found in the Flash Player Administration guide (see ‘Suppressing EOL Uninstall Prompts’ section).
For more information, you can view Adobe's Flash Player EOL Enterprise Information Page.