Variants can't be removed directly within Inventory Planner. To delete a variant in Inventory Planner, you would have to remove the variant on your connected platform then wait for it to be removed during the next sync.

However, instead of deleting a variant, you can mark it as non-replenishable in Inventory Planner then use filters to remove it from view.

You can mark any variant you don't keep in stock as non-replenishable, including drop-shipped or discontinued items.

To set products as non-replenishable, go to the Replenishment report and select the items you wish to edit.

Click Bulk Actions > Set non-replenishable.

In the popup, you'll be given the option to make the non-replenishable status temporary - for example, if your supplier is temporarily ceasing production on some items. You can set an end date for the status, or choose to have it apply for a week, a month, or a three month period.

Leave the "Temporary" checkbox unticked if you want the non-replenishable status to persist.​
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Once you're happy with your settings, click "Apply".

You can also set the non-replenishable status from Catalog > Forecast settings. Select the variants to update, then click Bulk actions > Set non-replenishable.

The Replenishable report only displays replenishable items by default. If you want to view items that are non-replenishable, remove the "Replenishable" filter at the top of the page.

Then select the items you wish to make replenishable. Click Bulk Actions > Set replenishable.

You can also set the replenishable status from Catalog > Forecast settings. Select the variants to update, then click Bulk actions > Set replenishable.

If you have a spreadsheet of variants (SKUs) whose replenishable status you want to change, you can import the information into Inventory Planner.

Learn more about importing replenishable statuses and other variant information here.