Remove unneeded feature

Author: orlp

tests/ui/threads-sendsync/tls-dont-move-after-init.rs

@@ -1,7 +1,6 @@
 //@ run-pass
 #![allow(stable_features)]
 //@ needs-threads
-#![feature(thread_local_try_with)]
 
 use std::cell::Cell;
 use std::thread;