To delete or remove category or categories in inventory, follow the steps given:
Step 1:
Select the Inventory module and then select the Create Items under the Item Details menu.
(Inventory-->Item Details-->Create Items)
Step 2:
Select Category Masters option. Against the respective category name , click on the Delete icon.
NOTE:
If sub categories or sub category types or Items are added against the Category, the Category cannot be deleted. To
delete the category, we have to delete all the sub categories or sub category types or Items added or mapped with
respect to that particular category.