"taskwarrior" & "timewarrior" snowblock decommission (#254)

Both snowblocks for Taskwarrior [1] and Timewarrior [2] are not required
anymore since they have been replaced with my own custom 💙 Go [3]
application that is currently private/closed source, but planned to be
open sourced later on.
Both tools are great and provide a lot of features, but are also kind
of overloaded with unused and unnecessary functions. I also missed the
possibility to integrate the data and API into my other Go applications
as well as web-based projects with a quite more modern techstack
(Protocol Buffers [4], NATS [5] Messaging, React SPA [6] etc.).

Therefore the snowblocks have been removed while the data is still
available through the Git repository history/logs [7].

[7]: https://git-scm.com/book/en/v2/Git-Basics-Viewing-the-Commit-History
[3]: https://go.dev
[1]: https://taskwarrior.org
[2]: https://timewarrior.net
[5]: https://nats.io
[4]: https://developers.google.com/protocol-buffers
[6]: https://reactjs.org

Closes GH-253
Related to GH-248, GH-253, GH-131

Co-authored-by: Sven Greb <development@svengreb.de>