title: Highcharts - Unable to remove xasis titles while drill down
body: <p>I have a chart with drill down option. Drill up chart xaxis titles are dates. Values are poleted based on the date. While drill down the details of the data are being displayed.</p>
  
  <p>While drilldown the dates which are displayed on the drillup is also diaplaying.</p>
  
  <p>Unable to remove the xaxis title while drill down.</p>
  
  <pre class="lang-html prettyprint-override"><code>{
  "chart":{
      "width":800,
      "height":400,
      "defaultSeriesType":"column",
      "marginLeft":70,"marginTop":80},
  "legend":{
      "align":"left",
      "layout":"vertical",
      "verticalAlign":"top",
      "x":100,"y":70},
      "plotOptions":{
          "column":{
              "borderWidth":0}},
  "series":[{
      "data":[{
          "x":1.4345658E12,
          "y":3.0,
          "drilldown":"1.4345658E12"},
          {
          "x":1.4346522E12,
          "y":2.0,
          "drilldown":"1.4346522E12"}],
      "name":"All",
      "type":"column",
      "tooltip":{
          "xDateFormat":"%m/%d/%Y"}},
      {
      "data":[],
      "name":"Abcd",
      "type":"column",
      "tooltip":{
          "xDateFormat":"%m/%d/%Y"}},
      {
      "data":[],
      "name":"Efgh",
      "type":"column",
      "tooltip":{
          "xDateFormat":"%m/%d/%Y"}},
      {
      "data":[],
      "name":"Ijkl",
      "type":"column",
      "tooltip":{
          "xDateFormat":"%m/%d/%Y"}}],
  "title":{
      "text":"Alphabet"},
  "xAxis":[{
      "minTickInterval":8.64E7,
      "min":1.4343066E12,
      "max":1.4346522E12,
      "type":"datetime",
      "dateTimeLabelFormats":{
          "day":"%m/%d/%Y"},
      "title":{
      "text":"Date"},
      "id":"default"},
      {
      "type":"category",
      "id":"drilldown"}],
  "yAxis":{
      "min":0.0,
      "title":{
          "text":"Count"}},
  "drilldown":{
      "series":[{
          "data":[{
              "y":1.0,
              "name":"A1"},
              {"y":1.0,
              "name":"B1"},
              {"y":1.0,
              "name":"C1"}],
          "id":"1.4345658E12",
          "xAxis":"drilldown"},
          {
          "data":[{
              "y":1.0,
              "name":"A11"},
              {
              "y":1.0,
              "name":"B11"}],
          "id":"1.4346522E12",
          "xAxis":"drilldown"}]
      }
  }
  </code></pre>