This is the 12974th most frequent Russian word.
лишними
"лишними" - "extra" or "unnecessary."
The word 'лишними' here is used as an adjective in plural form, describing the papers as excessive or redundant.
Эти бумаги оказались лишними.
These papers turned out to be unnecessary.
The word 'лишнее' is used in neuter singular form to denote items that are redundant and should be removed.
Всё лишнее надо убрать со стола.
Everything unnecessary must be removed from the table.
The word 'лишние' is used in plural form to describe purchases that are not essential, implying redundancy or excess.