KeyDrop

KeyDrop[assoc, {key1, key2, ...}] yields an association from which elements with keys key_i have been dropped.

KeyDrop[{assoc1, assoc2, ...}, keys] gives a list of associations.

KeyDrop[keys] represents an operator form of KeyDrop that can be applied to an expression.

Examples

Drop keys from an association:

KeyDrop[<|"a" -> 1, "b" -> 2, "c" -> 3|>, {"a", "c"}]
(* <|"b" -> 2|> *)

Operator form:

KeyDrop[{"b"}][<|"a" -> 1, "b" -> 2|>]
(* <|"a" -> 1|> *)

Please visit the official Wolfram Language Reference for more details.