PMS policy can be removed/hidden in case the policy has been completed and the policy's entries should not be visible in PMS dashboard irrespective of the policy being in incoming/pending/completed section.
Kindly note: If the policy is removed, you will not be able to get the reports of the same on front end.
The policy data will not be visible in the dashboard for the policy you have removed.

STEP 1:Click on Set-up circle

Step 2: Select Performance Management

Step 3: 'Select' the policy that you want to remove and then click on the icon under 'Remove policy'