List.delete
You're seeing just the function
delete, go back to List module for more information.
Specs
Deletes the given element from the list. Returns a new list without
the element.
If the element occurs more than once in the list, just
the first occurrence is removed.
Examples
iex> List.delete([:a, :b, :c], :a)
[:b, :c]
iex> List.delete([:a, :b, :c], :d)
[:a, :b, :c]
iex> List.delete([:a, :b, :b, :c], :b)
[:a, :b, :c]
iex> List.delete([], :b)
[]