Remove comments regarding NetBSD breakage

Since those no longer should apply, don't keep them around.

src/core/ev.c

@@ -1609,8 +1609,6 @@ JanetListenerState *janet_listen(JanetStream *stream, JanetListener behavior, in
     JanetListenerState *state = janet_listen_impl(stream, behavior, mask, size, user);
     struct kevent kev[2];
 
-    /* NOTE: NetBSD uses a different type for udata, might not work there or
-     * may warn/fail to compile (see wahern/cqueues)! */
     int length = 0;
     if (state->stream->_mask & JANET_ASYNC_LISTEN_READ) {
         EV_SETx(&kev[length], stream->handle, EVFILT_READ, EV_ADD | EV_ENABLE, 0, 0, stream);

src/include/janet.h

@@ -198,7 +198,6 @@ extern "C" {
 #define JANET_EV_EPOLL
 #endif
 
-/* TODO: Probably breaks NetBSD, might need help here. */
 #if defined(JANET_BSD) && !defined(JANET_EV_NO_KQUEUE)
 #define JANET_EV_KQUEUE
 #endif