Quicklisp has two distributions of the same SHA1 library

[samuel-hunter]

• sha1 - homepage https://github.com/massung/sha1 - from 2018 issue https://github.com/quicklisp/quicklisp-projects/issues/1521
• cl-sha1 - homepage https://github.com/naryl/sha1 - from 2021 issue https://github.com/quicklisp/quicklisp-projects/issues/2041

cl-sha1 is a fork of Massung's sha1 that replaced the dependency base64 with system-conflicting library, cl-base64, so that projects who also use the latter, or its 56 dependents (as of July 2022), or any dependents thereof, could also use cl-sha1.

Between then and now, the original sha1 system removed base64 as a dependency. With the original problem resolved, is it necessary to continue keeping two versions of the same code?