Unable to hide y-axis in outlier graph (Splunk_ML_Toolkit.OutliersViz)

[amiruliman145]

I'm try to disable the y-axis using similar option in line chart graph but using outlier graph it cant not hide the y-axis. Is it any method to disable this y-axis. 

<panel>
<viz type="Splunk_ML_Toolkit.OutliersViz">
<title>abc</title>
<search>
<query>index="abc" data_type="real_data" label=abc=$os$ | lookup outlier_value.csv label, operating_system OUTPUTNEW upper_bound lower_bound | eval rndoff_avg_rt = round(avg_rt,2) | rename rndoff_avg_rt as t | table _time t lower_bound upper_bound</query>
<earliest>$time.earliest$</earliest>
<latest>$time.latest$</latest>
</search>
<option name="drilldown">none</option>
<option name="charting.axisLabelsY.majorLabelVisibility">hide</option>
<option name="height">500</option>
<option name="refresh.display">progressbar</option>
</viz>
</panel>

Thanks