Johmai

I would like to know how to turn off revisions (and clear out old ones).
While I can understand the reasoning behind not messing with core files I do think that there should me more options here.
The basic question remains unresolved – can revisions be safely cleared without plugins?
@nail Yener, have you found a solution?
My reasons for wanting to clear them out are problem-solving related.
I also need to know how to check whether it’s working and clear out old ones?