remove unused include

Author: picnixz

Modules/pyexpat.c

@@ -7,10 +7,8 @@
 #include "pycore_pyhash.h"        // _Py_HashSecret
 #include "pycore_traceback.h"     // _PyTraceback_Add()
 
-#include <float.h>                // FLT_MAX
 #include <stdbool.h>
 #include <stddef.h>               // offsetof()
-
 #include "expat.h"
 #include "pyexpat.h"