fix: remove leave policy assignment creation patch (#31097)

diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 785e2ba..ad1ba2a 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -231,7 +231,6 @@
 erpnext.patches.v13_0.update_reason_for_resignation_in_employee
 execute:frappe.delete_doc("Report", "Quoted Item Comparison")
 erpnext.patches.v13_0.update_member_email_address
-erpnext.patches.v13_0.create_leave_policy_assignment_based_on_employee_current_leave_policy
 erpnext.patches.v13_0.update_pos_closing_entry_in_merge_log
 erpnext.patches.v13_0.add_po_to_global_search
 erpnext.patches.v13_0.update_returned_qty_in_pr_dn
diff --git a/erpnext/patches/v13_0/create_leave_policy_assignment_based_on_employee_current_leave_policy.py b/erpnext/patches/v13_0/create_leave_policy_assignment_based_on_employee_current_leave_policy.py
deleted file mode 100644
index 59b17ee..0000000
--- a/erpnext/patches/v13_0/create_leave_policy_assignment_based_on_employee_current_leave_policy.py
+++ /dev/null
@@ -1,94 +0,0 @@
-# Copyright (c) 2019, Frappe and Contributors
-# License: GNU General Public License v3. See license.txt
-
-
-import frappe
-
-
-def execute():
-	frappe.reload_doc("hr", "doctype", "leave_policy_assignment")
-	frappe.reload_doc("hr", "doctype", "employee_grade")
-	employee_with_assignment = []
-	leave_policy = []
-
-	if "leave_policy" in frappe.db.get_table_columns("Employee"):
-		employees_with_leave_policy = frappe.db.sql(
-			"SELECT name, leave_policy FROM `tabEmployee` WHERE leave_policy IS NOT NULL and leave_policy != ''",
-			as_dict=1,
-		)
-
-		for employee in employees_with_leave_policy:
-			alloc = frappe.db.exists(
-				"Leave Allocation",
-				{"employee": employee.name, "leave_policy": employee.leave_policy, "docstatus": 1},
-			)
-			if not alloc:
-				create_assignment(employee.name, employee.leave_policy)
-
-			employee_with_assignment.append(employee.name)
-			leave_policy.append(employee.leave_policy)
-
-	if "default_leave_policy" in frappe.db.get_table_columns("Employee Grade"):
-		employee_grade_with_leave_policy = frappe.db.sql(
-			"SELECT name, default_leave_policy FROM `tabEmployee Grade` WHERE default_leave_policy IS NOT NULL and default_leave_policy!=''",
-			as_dict=1,
-		)
-
-		# for whole employee Grade
-		for grade in employee_grade_with_leave_policy:
-			employees = get_employee_with_grade(grade.name)
-			for employee in employees:
-
-				if employee not in employee_with_assignment:  # Will ensure no duplicate
-					alloc = frappe.db.exists(
-						"Leave Allocation",
-						{"employee": employee.name, "leave_policy": grade.default_leave_policy, "docstatus": 1},
-					)
-					if not alloc:
-						create_assignment(employee.name, grade.default_leave_policy)
-					leave_policy.append(grade.default_leave_policy)
-
-	# for old Leave allocation and leave policy from allocation, which may got updated in employee grade.
-	leave_allocations = frappe.db.sql(
-		"SELECT leave_policy, leave_period, employee FROM `tabLeave Allocation` WHERE leave_policy IS NOT NULL and leave_policy != '' and docstatus = 1 ",
-		as_dict=1,
-	)
-
-	for allocation in leave_allocations:
-		if allocation.leave_policy not in leave_policy:
-			create_assignment(
-				allocation.employee,
-				allocation.leave_policy,
-				leave_period=allocation.leave_period,
-				allocation_exists=True,
-			)
-
-
-def create_assignment(employee, leave_policy, leave_period=None, allocation_exists=False):
-	if frappe.db.get_value("Leave Policy", leave_policy, "docstatus") == 2:
-		return
-
-	filters = {"employee": employee, "leave_policy": leave_policy}
-	if leave_period:
-		filters["leave_period"] = leave_period
-
-	if not frappe.db.exists("Leave Policy Assignment", filters):
-		lpa = frappe.new_doc("Leave Policy Assignment")
-		lpa.employee = employee
-		lpa.leave_policy = leave_policy
-
-		lpa.flags.ignore_mandatory = True
-		if allocation_exists:
-			lpa.assignment_based_on = "Leave Period"
-			lpa.leave_period = leave_period
-			lpa.leaves_allocated = 1
-
-		lpa.save()
-		if allocation_exists:
-			lpa.submit()
-			# Updating old Leave Allocation
-			frappe.db.sql("Update `tabLeave Allocation` set leave_policy_assignment = %s", lpa.name)
-
-
-def get_employee_with_grade(grade):
-	return frappe.get_list("Employee", filters={"grade": grade})