[Matrix]: remove materialized sink matrix from the hashtable.
[Matrix]: remove materialized sink matrix from the hashtable.

flashxio/FlashX,flashxio/FlashX,icoming/FlashX,icoming/FlashX,icoming/FlashX,flashxio/FlashX,icoming/FlashX,flashxio/FlashX,flashxio/FlashX,icoming/FlashX,flashxio/FlashX