Update the Windows comment

Author: vstinner

PC/pyconfig.h.in

@@ -753,8 +753,7 @@ Py_NO_ENABLE_SHARED to find out.  Also support MS_NO_COREDLL for b/w compat */
 /* Define if libssl has X509_VERIFY_PARAM_set1_host and related function */
 #define HAVE_X509_VERIFY_PARAM_SET1_HOST 1
 
-// Truncate the thread name to 64 characters. The OS limit is 32766 wide
-// characters, but long names aren't of practical use.
+// Truncate the thread name to 32766 characters.
 #define _PYTHREAD_NAME_MAXLEN 32766
 
 #endif /* !Py_CONFIG_H */