Merge branch '228740-remove-redundant-method' into 'master'

Remove redundant method from field

See merge request gitlab-org/gitlab!49674

ee/app/graphql/types/vulnerability_type.rb

@@ -66,8 +66,7 @@ module Types
           method: :created_at
 
     field :confirmed_at, Types::TimeType, null: true,
-          description: 'Timestamp of when the vulnerability state was changed to confirmed',
-          method: :confirmed_at
+          description: 'Timestamp of when the vulnerability state was changed to confirmed'
 
     field :resolved_at, Types::TimeType, null: true,
           description: 'Timestamp of when the vulnerability state was changed to resolved'