fixing error occurences tooltip (#72425) (#72586)

Author: cauemarcondes

x-pack/plugins/apm/public/components/app/ErrorGroupDetails/Distribution/index.tsx

@@ -12,7 +12,6 @@ import d3 from 'd3';
 import { scaleUtc } from 'd3-scale';
 import { mean } from 'lodash';
 import React from 'react';
-import { px } from '../../../../style/variables';
 import { asRelativeDateTimeRange } from '../../../../utils/formatters';
 import { getTimezoneOffsetInMs } from '../../../shared/charts/CustomPlot/getTimezoneOffsetInMs';
 // @ts-ignore
@@ -89,7 +88,7 @@ export function ErrorDistribution({ distribution, title }: Props) {
         <span>{title}</span>
       </EuiTitle>
       <Histogram
-        height={px(180)}
+        height={180}
         noHits={distribution.noHits}
         tooltipHeader={tooltipHeader}
         verticalLineHover={(bucket: FormattedBucket) => bucket.x}