[algorithms] If algorithms are only usable, users can still see it through the "diff" panel

Example:

https://www.beat-eu.org/platform/algorithms/diff/anjithgeorge/KBOC_IITKGP_ANJITH_APRIL7_1/10/anjithgeorge/KBOC_IITKGP_ANJITH_APRIL7_1/14/

This option should be removed.