remove hacks for previous windows negative timestamp behavior

Author: gesslerpd

Modules/_datetimemodule.c

@@ -5584,22 +5584,7 @@ datetime_from_timet_and_us(PyTypeObject *cls, TM_FUNC f, time_t timet, int us,
     second = Py_MIN(59, tm.tm_sec);
 
     /* local timezone requires to compute fold */
-    if (tzinfo == Py_None && f == _PyTime_localtime
-    /* On Windows, passing a negative value to local results
-     * in an OSError because localtime_s on Windows does
-     * not support negative timestamps. Unfortunately this
-     * means that fold detection for time values between
-     * 0 and max_fold_seconds will result in an identical
-     * error since we subtract max_fold_seconds to detect a
-     * fold. However, since we know there haven't been any
-     * folds in the interval [0, max_fold_seconds) in any
-     * timezone, we can hackily just forego fold detection
-     * for this time range.
-     */
-#ifdef MS_WINDOWS
-        && (timet - max_fold_seconds > 0)
-#endif
-        ) {
+    if (tzinfo == Py_None && f == _PyTime_localtime) {
         long long probe_seconds, result_seconds, transition;
 
         result_seconds = utc_to_seconds(year, month, day,