Any form of filmed media will need editors, but from what I understand, the role of editors in anime production is significantly less than that of editors in film. Unlike when you're filming something, it's simply too expensive to animate stuff that you're not going to use, so most of the cuts are worked out at the storyboard stage. Editors in anime will be doing very minimal trimming and compiling and the most.
"Never fall for a tennis player. Love means nothing to them"