chore!: remove activity log feeds (#33294)

- This contains little to no information and practically no one uses this.
- Also causes a lot of problem by adding way too many feeds in activity
  log to the point where activity page doesn't even load.

erpnext/controllers/selling_controller.py

@@ -19,9 +19,6 @@ class SellingController(StockController):
 	def __setup__(self):
 		self.flags.ignore_permlevel_for_fields = ["selling_price_list", "price_list_currency"]
 
-	def get_feed(self):
-		return _("To {0} | {1} {2}").format(self.customer_name, self.currency, self.grand_total)
-
 	def onload(self):
 		super(SellingController, self).onload()
 		if self.doctype in ("Sales Order", "Delivery Note", "Sales Invoice"):