removeFilterHandler (removeFilterHandler) {
        if (!arguments.length) {
            return this._removeFilterHandler;
        }
        this._removeFilterHandler = removeFilterHandler;
        return this;
    }
Set or get the remove filter handler. The remove filter handler is a function that removes a
filter from the chart's current filters. Using a custom remove filter handler allows you to
change how filters are removed or perform additional work when removing a filter, e.g. when
using a filter server other than crossfilter.

The handler should return a new or modified array as the result.
@example
// default remove filter handler
chart.removeFilterHandler(function (filters, filter) {
    for (var i = 0; i < filters.length; i++) {
        if (filters[i] <= filter && filters[i] >= filter) {
            filters.splice(i, 1);
            break;
        }
    }
    return filters;
});

// custom filter handler (no-op)
chart.removeFilterHandler(function(filters, filter) {
    return filters;
});
@param {Function} [removeFilterHandler]
@returns {Function|BaseMixin}