Customise the product editor area in PCM backoffice

In hybris 6.5, i am trying to remove some of the tabs(prices, stock, variants, bmecat etc.) from the product editor area widget in the product cockpit perspective. In my custom backoffice extension, in config.xml, i am trying to override the below context. However the tabs are not getting removed. My widgets.xml file is empty.

 <context merge-by="type" parent="GenericItem" type="Product" component="editor-area" module="pcmbackoffice">

What should be the way to achieve this? Thanks.