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/support/doctype/issue/issue.py

@@ -18,9 +18,6 @@ from frappe.utils.user import is_website_user
 
 
 class Issue(Document):
-	def get_feed(self):
-		return "{0}: {1}".format(_(self.status), self.subject)
-
 	def validate(self):
 		if self.is_new() and self.via_customer_portal:
 			self.flags.create_communication = True

erpnext/support/doctype/warranty_claim/warranty_claim.py

@@ -10,9 +10,6 @@ from erpnext.utilities.transaction_base import TransactionBase
 
 
 class WarrantyClaim(TransactionBase):
-	def get_feed(self):
-		return _("{0}: From {1}").format(self.status, self.customer_name)
-
 	def validate(self):
 		if session["user"] != "Guest" and not self.customer:
 			frappe.throw(_("Customer is required"))