Issue 2231: Remove redundant AckFuture reference from documentation. (#2232)
Issue 2231: Remove redundant AckFuture reference from documentation. (#2232)


Signed-off-by: Sandeep <d4c3b2e88eba404dcfe4cb6465fc67e71862e085@emc.com>

pravega/pravega,pravega/pravega,pravega/pravega