treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts

With all callbacks converted, and the timer callback prototype
switched over, the TIMER_FUNC_TYPE cast is no longer needed,
so remove it. Conversion was done with the following scripts:

    perl -pi -e 's|\(TIMER_FUNC_TYPE\)||g' \
        $(git grep TIMER_FUNC_TYPE | cut -d: -f1 | sort -u)

    perl -pi -e 's|\(TIMER_DATA_TYPE\)||g' \
        $(git grep TIMER_DATA_TYPE | cut -d: -f1 | sort -u)

The now unused macros are also dropped from include/linux/timer.h.

Signed-off-by: Kees Cook <keescook@chromium.org>

net/netrom/nr_timer.c

@@ -45,7 +45,7 @@ void nr_init_timers(struct sock *sk)
 	timer_setup(&nr->idletimer, nr_idletimer_expiry, 0);
 
 	/* initialized by sock_init_data */
-	sk->sk_timer.function = (TIMER_FUNC_TYPE)nr_heartbeat_expiry;
+	sk->sk_timer.function = nr_heartbeat_expiry;
 }
 
 void nr_start_t1timer(struct sock *sk)