Removed unused imports

Author: Harshil-Gupta

README.md

@@ -1187,7 +1187,7 @@ any) in brackets, available languages and additional holiday categories. All cou
 <td>PN</td>
 <td></td>
 <td><strong>en_PN</strong>, en_US, fil, th</td>
-<td>WORKDAY</td>
+<td></td>
 </tr>
 <tr>
 <td>Poland</td>

holidays/countries/pitcairn_islands.py

@@ -13,7 +13,6 @@
 from gettext import gettext as tr
 
 from holidays.calendars.gregorian import JAN, JUN
-from holidays.constants import PUBLIC
 from holidays.groups import ChristianHolidays
 from holidays.holiday_base import HolidayBase