cpplint fixup

Author: jbrockmendel

pandas/_libs/src/datetime/np_datetime_strings.c

@@ -689,7 +689,6 @@ int get_datetime_iso_8601_strlen(int local, PANDAS_DATETIMEUNIT base) {
  */
 int make_iso_8601_datetime(pandas_datetimestruct *dts, char *outstr, int outlen,
                            PANDAS_DATETIMEUNIT base) {
-
     char *substr = outstr, sublen = outlen;
     int tmplen;