Remove the redundant attributes

DeleteInstance action inherits from tables.DeleteAction,
the parent class has the 'name', 'classes' and 'icon' attributes,
So remove the unused attributes.

Change-Id: I5ef01ce68edcd7e78ac95747cf5fd8d8f8c96c81

disaster_recovery/backups/tables.py

@@ -37,9 +37,6 @@ class Restore(tables.LinkAction):
 
 
 class DeleteBackup(tables.DeleteAction):
-    name = "delete"
-    classes = ("btn-danger",)
-    icon = "remove"
     help_text = _("Delete backups is not recoverable.")
 
     @staticmethod

disaster_recovery/clients/tables.py

@@ -26,9 +26,6 @@ class Filter(tables.FilterAction):
 
 
 class DeleteClient(tables.DeleteAction):
-    name = "delete"
-    classes = ("btn-danger",)
-    icon = "remove"
     help_text = _("Delete Clients is not recoverable.")
 
     @staticmethod

disaster_recovery/jobs/tables.py

@@ -44,9 +44,6 @@ class AttachJobToSession(tables.LinkAction):
 
 
 class DeleteJob(tables.DeleteAction):
-    name = "delete"
-    classes = ("btn-danger",)
-    icon = "remove"
     help_text = _("Delete jobs is not recoverable.")
 
     @staticmethod
@@ -193,9 +190,6 @@ class JobsTable(tables.DataTable):
 
 
 class DeleteAction(tables.DeleteAction):
-    name = "delete"
-    classes = ("btn-danger",)
-    icon = "remove"
     help_text = _("Delete actions is not recoverable.")
 
     @staticmethod

disaster_recovery/sessions/tables.py

@@ -41,9 +41,6 @@ class CreateJob(tables.LinkAction):
 
 
 class DeleteSession(tables.DeleteAction):
-    name = "delete"
-    classes = ("btn-danger",)
-    icon = "remove"
     help_text = _("Delete sessions is not recoverable.")
 
     @staticmethod
@@ -84,8 +81,6 @@ class DeleteMultipleActions(DeleteSession):
 
 class DeleteJobFromSession(tables.DeleteAction):
     name = "delete_job_from_session"
-    classes = ("btn-danger",)
-    icon = "remove"
     help_text = _("Delete jobs is not recoverable.")
 
     @staticmethod