Check usage of `metric` table

@mojeeb.sedeqi could you please check if the dashboard is using the metric table from the database? Right now the information stored in there is redudant, useless and should be removed. I would like to drop the table with the next update and need to re-consider if it's ok for the dashboard as well.

Thanks in advance.

assigned to @mojeeb.sedeqi

It is not used anywhere for the dashboard as well.