Remove unused include

Author: colesbury

Include/internal/pycore_pystate.h

@@ -8,10 +8,8 @@ extern "C" {
 #  error "this header requires Py_BUILD_CORE define"
 #endif
 
-#include "pycore_freelist_state.h"  // _Py_freelists
-#include "pycore_runtime.h"         // _PyRuntime
-#include "pycore_tstate.h"          // _PyThreadStateImpl
-
+#include "pycore_runtime.h"       // _PyRuntime
+#include "pycore_tstate.h"        // _PyThreadStateImpl
 
 // Values for PyThreadState.state. A thread must be in the "attached" state
 // before calling most Python APIs. If the GIL is enabled, then "attached"