Pleroma.User.Backup: fix some dialyzer errors

lib/pleroma/user/backup.ex:207:call
The function call will not succeed.

:zip.create(
  string(),
  [:"\"actor.json\"", :"\"outbox.json\"", :"\"likes.json\"", :"\"bookmarks.json\""],
  [{:cwd, binary()}, ...]
)

will never return since the success typing is:
(
  atom() | [atom() | [any()] | char()],
  [
    atom()
    | [atom() | [any()] | char()]
    | {atom() | [atom() | [any()] | char()], binary()}
    | {atom() | [atom() | [any()] | char()], binary(),
       {:file_info, :undefined | non_neg_integer(),
        :device | :directory | :other | :regular | :symlink | :undefined,
        :none | :read | :read_write | :undefined | :write,
        :undefined | non_neg_integer() | {_, _}, :undefined | non_neg_integer() | {_, _},
        :undefined | non_neg_integer() | {_, _}, :undefined | non_neg_integer(),
        :undefined | non_neg_integer(), :undefined | non_neg_integer(),
        :undefined | non_neg_integer(), :undefined | non_neg_integer(),
        :undefined | non_neg_integer(), :undefined | non_neg_integer()}}
  ],
  [
    :cooked
    | :memory
    | :verbose
    | {:comment, string()}
    | {:compress, :all | [[any()]] | {:add, [any()]} | {:del, [any()]}}
    | {:cwd, string()}
    | {:uncompress, :all | [[any()]] | {:add, [any()]} | {:del, [any()]}}
  ]
) ::
  {:error, _}
  | {:ok,
     atom() | [atom() | [any()] | char()] | {atom() | [atom() | [any()] | char()], binary()}}

and the contract is
(name, fileList, options) :: retValue
when name: :file.name(),
     fileList: [:FileSpec],
     fileSpec:
       :file.name() | {:file.name(), binary()} | {:file.name(), binary(), :file.file_info()},
     options: [:Option],
     option: create_option(),
     retValue:
       {:ok, FileName :: filename()}
       | {:ok, {FileName :: filename(), binary()}}
       | {:error, Reason :: term()}

0 files changed, 0 insertions, 0 deletions