Select the product for editing from the list on the Products page by clicking the Edit product link in the menu. The menu becomes visible when you hold the pointer over the product row.
The product form opens.
In the Payment method basic information section of the product form, you can see all product categories that the product belongs to. Click the icon in each row you'd like to delete.
2) Using the product card
You can remove a product from a product category in the product card's Categories item in the pane on the right.
Click the icon on the right side of the product category to remove the product from that category.
3) Using the product category's product list
You can delete a product from a product category by using the Remove from category functionality located in the product row's tool menu on the product category's product list.