After Drive, it looked like director Nicolas Winding Refn and actor Ryan Gosling would be constant partners since they were both doing Only God Forgives and then the remake of Logan's Run.  It looks like that partnership will be taking a break after Only God Forgives.  Variety's Justin Kroll has tweeted that Gosling has left the remake of Logan's Run.  Before everyone starts speculating on a falling out between Refn and Gosling, there are numerous reasons why Gosling might have dropped off Logan's Run.Hit the jump for more.As The Playlist points out, there are multiple reasons why Gosling departed Logan's Run.  First, Warner Bros. may have gotten skittish about placing what will likely be a tentpole sci-fi action movie on the shoulders of Gosling, who has never opened a blockbuster before, although everyone has to start somewhere, and it's not like he's a stranger to mainstream movies.  He's worked with the studio before on Crazy, Stupid, Love. and the upcoming Gangster Squad.There could also be a scheduling conflict.  Filming on Gosling's directorial debut, How to Catch a Monster, is set to being in the spring, and Refn might be starting pre-production on Logan's Run if he's finished up on Only God Forgives.  The director recently told French outlet JDD (via The Film Stage) that he will be "fine-tuning" the picture through December, and Warner Bros. has been waiting on their Logan's Run movie for a while.  If they want to fast-track it and Refn wants to stay on board, he might have to do it without Gosling.However, there doesn't seem to be any bad blood between the two.  As Refn recently told The Evening Standard, he's happy to give Gosling directing advice: "I will give him advice if he wants me to. I told him if he wakes up in sweats at 5am on the morning of shooting to call me."