Removing the old reports

Hi Team,

i have created so many reports and now would like to delete the old reports.
Since i can not find any tab existing to deleting the old reports.

Is there any way we could delete the reports only?

all these are stored in .kibana index by default.
would it possible to delete report details part from .kibana index.

kibana 7 version is being used.

regards.
Manish