fix: removed reference to method not in version-12 (#21335)

removed scheduler event incorrectly added in this version.

as reported on discuss -
https://discuss.erpnext.com/t/internal-server-error-and-healthcare-module-missing/60479/6?u=akurungadam

erpnext/hooks.py

@@ -268,9 +268,7 @@ doc_events = {
 
 scheduler_events = {
 	"all": [
-		"erpnext.projects.doctype.project.project.project_status_update_reminder",
-		"erpnext.healthcare_healthcare.doctype.patient_appointment.patient_appointment.send_appointment_reminder"
-
+		"erpnext.projects.doctype.project.project.project_status_update_reminder"
 	],
 	"hourly": [
 		'erpnext.hr.doctype.daily_work_summary_group.daily_work_summary_group.trigger_emails',
@@ -530,4 +528,4 @@ global_search_doctypes = {
 		{'doctype': 'Hotel Room Package', 'index': 3},
 		{'doctype': 'Hotel Room Type', 'index': 4}
 	]
-}
+}