To unpin a card from the Dashboard:
Navigate to Analytics > Explorer > Cards.
You can determine whether a card is already pinned to the Dashboard by its value in the Pinned column. Only cards showing Yes in the Pinned column can be unpinned from the Dashboard.
Locate the card to unpin from the Dashboard.
Click the menu icon and then select Unpin.
The card is now unpinned from the Dashboard.
Alternative: You can also directly unpin a card in the Dashboard by clicking the menu icon in the card and selecting Unpin.