Remove animated smilies

rational for removal:
It doesn't work on osx
having a lot of smilies breaks clients on linux due to file descriptor limits (it appears to open a copy of every smilie for every memo open, this can add up quickly)
it leaks and eventually slows down clients if left on for too long

the second issue could probably be fixed in other ways but based on point 3 alone I figure it'd be better to just drop the feature altogether, I dont imagine much of anybody has it enabled