feat: remove Dunning dashboard as there are no incoming links

erpnext/accounts/doctype/dunning/dunning_dashboard.py

@@ -1,12 +0,0 @@
-from frappe import _
-
-
-def get_data():
-	return {
-		"fieldname": "dunning",
-		"non_standard_fieldnames": {
-			"Journal Entry": "reference_name",
-			"Payment Entry": "reference_name",
-		},
-		"transactions": [{"label": _("Payment"), "items": ["Payment Entry", "Journal Entry"]}],
-	}