KAT-50: delete to lib/events-patient/add_patient.dart

rescueapp/lib/events-patient/add_patient.dart

-import 'package:rescueapp/events-patient/patient_event.dart';
-import 'package:rescueapp/model-patient/patient.dart';
-
-class AddPatient extends PatientEvent {
-  Patient newPatient;
-
-  AddPatient(Patient patient) {
-    newPatient = patient;
-  }
-}