Do not export Pool.
Do not export Pool.

- it is not referenced outside of its package: others use the Client interface instead.

[#93927268]

Signed-off-by: Toby Rumans <516e7840355d33b790e9dc5c111fe7c7c270a08f@pivotal.io>

zachgersh/atc,zachgersh/atc,zachgersh/atc,zachgersh/atc