Auto-completion suggests attributes already present

[Jolg42]

Similarly to #1079

model hello {
  id Bytes @id() @default("") @ignore @unique @map("") @relation() 
}

Note, this combination is definitely not expected to work. But the completion could, in general, remove the already present attributes.

Here we could do the same as we do for @map(), also for @unique, @default(), @ignore, @relation()