Clean up branches no longer needed

[jrr-cpt]

@MoffMade these are branches we should no longer need. The main content of their tutorial has been cleared to main site, or they are out of date. I think they can be deleted.

reopening
generate-annotation-table
2020-comparative
finding-lysis-genes
special-lysis-tutorial
for-scientists
finding-intron-containing-genes
Tutorial_edits_jay