hide tick lables in chart

no_cat_labels.rb

p = Axlsx::Package.new
p.workbook.add_worksheet(:name => "Bar Chart") do |sheet|
  sheet.add_row ["A Simple Bar Chart"]
  sheet.add_row ["First", "Second", "Third"]
  sheet.add_row [1, 2, 3]
  sheet.add_chart(Axlsx::Bar3DChart, :start_at => "A4", :end_at => "F17") do |chart|
    chart.add_series :data => sheet["A3:C3"], :labels => sheet["A2:C2"], :title => sheet["A1"]
    chart.valAxis.label_rotation = -45
    chart.catAxis.label_rotation = 45
    chart.d_lbls.d_lbl_pos = :outEnd
    chart.d_lbls.show_val = true
    chart.catAxis.tick_lbl_pos = :none
  end
 end

p.serialize 'no_cat_labels.xlsx'