Remove (Caching)PermutedEntropyProvider

It's been replaced by NormalizedPermutingEntropyProvider; see commits
7c0efea0a6 and 4355667974.

BUG=890413,912368

Change-Id: I962ecdde976f84c0cdadfb6c1a36a3d12246fb0b
Reviewed-on: https://chromium-review.googlesource.com/c/1388287
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Paul Miller <paulmiller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619573}
13 files changed