281fbdddc2
Summary: PersistentCacheOptions class in persistent_cache_tier.h is not used any where yet in the code base but it break the unity build because it have the same name as PersistentCacheOptions in table/persistent_cache_helper.h Remove it temporarily, and the @krad can add it again with a different name when we start using it Test Plan: make unity_test -j64 make check -j64 Reviewers: kradhakrishnan, sdong Reviewed By: sdong Subscribers: andrewkr, dhruba Differential Revision: https://reviews.facebook.net/D59349