remove unused module import and error classes
diff --git a/erpnext/hr/doctype/leave_application/leave_application.py b/erpnext/hr/doctype/leave_application/leave_application.py
index d8a2fe3..48d9b87 100755
--- a/erpnext/hr/doctype/leave_application/leave_application.py
+++ b/erpnext/hr/doctype/leave_application/leave_application.py
@@ -9,13 +9,10 @@
from erpnext.hr.utils import set_employee_name, get_leave_period
from erpnext.hr.doctype.leave_block_list.leave_block_list import get_applicable_block_dates
from erpnext.hr.doctype.employee.employee import get_holiday_list_for_employee
-from erpnext.hr.doctype.employee_leave_approver.employee_leave_approver import get_approver_list
from erpnext.buying.doctype.supplier_scorecard.supplier_scorecard import daterange
class LeaveDayBlockedError(frappe.ValidationError): pass
class OverlapError(frappe.ValidationError): pass
-class InvalidLeaveApproverError(frappe.ValidationError): pass
-class LeaveApproverIdentityError(frappe.ValidationError): pass
class AttendanceAlreadyMarkedError(frappe.ValidationError): pass
class NotAnOptionalHoliday(frappe.ValidationError): pass