don't explicitly delete PPCallbacks-based compiler plugin actions
don't explicitly delete PPCallbacks-based compiler plugin actions

If the class is based on PPCallbacks too, Clang internals will delete
the instance.

Change-Id: I6dd83d800e6cca17eb0b5de23c8994f11c087fd5

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core