Drop GFM support in Projects::ForksController#index

Summary

Drop GFM support in forks page (Projects::ForksController#index) for performance.

Example Project

• https://gitlab.com/gitlab-org/gitlab-ce/forks (screenshot is as below)

Proposal

Drop GFM support in forks page (Projects::ForksController#index) for performance and fixing a tiny UI bug.

Screenshots

• Okan Civelek's project description has a link by autolink of GFM (underlined due to mouse hover)
• Anthony Papillon's last commit message has no white space (UI bug) (see https://gitlab.com/apapillon/gitlab-ce/commit/dee4830f269530ecd6cff7dc903771d3b899c3be)

Links / references

Meta: #35160 (closed)