Removed unused code from miq_ae_controller
Removed unused code from miq_ae_controller

User cannot change priority of fields on Instance edit screen, removed leftover code that was doing sort_by on priority field for class ae_fields.
(transferred from ManageIQ/manageiq@3ff09f0cc5eafb0e19b3de4b3ec1dd7971da06a9)

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic