On Hover Exemplar text is showing, want to get rid of heading "exemplar" from the data

Context-

the x-axis shows a few properties grouped by their classification type on the respective classification date
Y-axis shows the daily count of those properties.
PFA image for the panel.

Issue
On hover over any of the values , it is showing the values under Exemplar title. Can we get rid of this title? I f Yes then how?