utils: Rename gcal_clear_datetime to gcal_clear_date_time

To keep it consistent with the rest of the API.

src/utils/gcal-utils.c

@@ -634,65 +634,6 @@ icaltime_compare_with_current (const icaltimetype *date1,
   return result;
 }
 
-/**
- * get_start_of_week:
- * @date: an #icaltimetype
- *
- * Retrieves the start of the week that @date
- * falls in. This function already takes the
- * first weekday into account.
- *
- * Returns: (transfer full): a #GDateTime with
- * the start of the week.
- */
-GDateTime*
-get_start_of_week (icaltimetype *date)
-{
-  icaltimetype *new_date;
-  GDateTime *dt;
-
-  new_date = g_new0 (icaltimetype, 1);
-  *new_date = icaltime_from_day_of_year (icaltime_start_doy_week (*date, get_first_weekday () + 1),
-                                         date->year);
-  new_date->is_date = 0;
-  new_date->hour = 0;
-  new_date->minute = 0;
-  new_date->second = 0;
-
-  dt = g_date_time_new_local (new_date->year,
-                              new_date->month,
-                              new_date->day,
-                              0, 0, 0);
-
-  g_clear_pointer (&new_date, g_free);
-
-  return dt;
-}
-
-/**
- * get_end_of_week:
- * @date: an #icaltimetype
- *
- * Retrieves the end of the week that @date
- * falls in. This function already takes the
- * first weekday into account.
- *
- * Returns: (transfer full): a #GDateTime with
- * the end of the week.
- */
-GDateTime*
-get_end_of_week (icaltimetype *date)
-{
-  GDateTime *week_start, *week_end;
-
-  week_start = get_start_of_week (date);
-  week_end = g_date_time_add_days (week_start, 7);
-
-  g_clear_pointer (&week_start, g_date_time_unref);
-
-  return week_end;
-}
-
 /**
  * is_clock_format_24h:
  *