[arch-general] Remove Clisp from repository

[mpan]

> I didn't know about this repository on GitLab, but if you go to the
> official Clisp site (https://www.gnu.org/software/clisp/), you will see
> that the latest version (2.49) was released on 2010-07-07.
  For clarification and providing a verifiable source: that SourceForge
page is ancient. The repository has been officially moved to GitLab over
a year ago.[1] And the SF repo was active until that time.[2]
____
[1] <https://sourceforge.net/p/clisp/mailman/message/36299743/>
[2] <https://sourceforge.net/p/clisp/clisp/ci/default/tree/>

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