event: remove include of spdk_internal/thread.h

It's not needed.  Add it to one of the UT where it
is needed though.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I06628184c22df68deffce3ca0561878569ccf3f4
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4717
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

lib/event/reactor.c

@@ -35,7 +35,6 @@
 #include "spdk/likely.h"
 
 #include "spdk_internal/event.h"
-#include "spdk_internal/thread.h"
 
 #include "spdk/log.h"
 #include "spdk/thread.h"

test/unit/lib/event/reactor.c/reactor_ut.c

@@ -36,6 +36,7 @@
 #include "spdk_cunit.h"
 #include "common/lib/test_env.c"
 #include "event/reactor.c"
+#include "spdk_internal/thread.h"
 
 static void
 test_create_reactor(void)