Remove obsolete comment.
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 51bd85b..84813ba 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -448,7 +448,6 @@
 See the profiler chapter in the library manual."
 );
 
-/* TODO: deprecate */
 static int _check_interval = 100;
 
 static PyObject *