What must be done to delete one or more files from an application when using a partial application update?

A.
Manually delete the files from the file system (on all nodes if clustered).

B.
Supply the paths to the files that should be deleted in the administrative console.

C.
Include a META-INF/ibm-partialapp-delete.props in the partial application update file.

D.
Select the files that need to be deleted in the file selector section of the form for the partial application
update.

Explanation:
If you want to delete application files when you deploy a partial application update, you must first supply a
special metadata file called META-INF/ibm-partialapp-delete.props in the partial application compressed file
before you continue with the following procedure.
Etc.
https://www.ibm.com/support/knowledgecenter/en/SSZLC2_8.0.0/
com.ibm.commerce.developer.doc/tasks/tdpdeploying_j2ee_assets_partial.htm