bpo-40268: Remove a few pycore_pystate.h includes (GH-19510)

diff --git a/Parser/listnode.c b/Parser/listnode.c
index 3bcc03e..c806b98 100644
--- a/Parser/listnode.c
+++ b/Parser/listnode.c
@@ -2,8 +2,8 @@
 /* List a node on a file */
 
 #include "Python.h"
-#include "pycore_interp.h"   // PyInterpreterState.parser
-#include "pycore_pystate.h"  // _PyInterpreterState_GET
+#include "pycore_interp.h"        // PyInterpreterState.parser
+#include "pycore_pystate.h"       // _PyInterpreterState_GET()
 #include "token.h"
 #include "node.h"