1033 drop support for list filter

[chlebowa]

part of insightsengineering/teal#1033
companion to insightsengineering/teal#1040

[pawelru]

Please correct the docs accordingly:

teal.slice/R/FilteredDatasetMAE.R

Lines 63 to 67 in ea69177

	#' @param state (`named list`)\cr
	#' names of the list should correspond to the names of the initialized `FilterStates`
	#' kept in `private$filter_states`. For this object they are `"subjects"` and
	#' names of the experiments. Values of initial state should be relevant
	#' to the referred column.

teal.slice/R/FilterStates.R

Lines 247 to 250 in ea69177

	#' @param state (`named list`)\cr
	#' should contain values which are initial selection in the `FilterState`.
	#' Names of the `list` element should correspond to the name of the
	#' column in `data`.

[pawelru]

Sorry - my previous comment was unrelated - it was about docs for teal_slices and not teal_slice