I just read the article. Removing all unsourced material, and how- to's (as per [[WP:NOT]], can leave the article informative without being a user manual for suicide.
Good response. Fixing is always better than deleting, where possible. A how-to guide to suicide is not appropriate. An encyclopedic article on suicide methods is. The article should includes statistics about what methods are most used, etc. It should not contain detailed instructions.