net/ena/base: remove mutable RSS from host info
net/ena/base: remove mutable RSS from host info

This feature wasn't used by any of the drivers. Because of that, it was
removed.

Signed-off-by: Michal Krawczyk <a91dcbb4df49d8bfe0a9930d7ff911a4292ca1f5@semihalf.com>
Reviewed-by: Igor Chauskin <a8d4b4819272c1df83ebe995beed3305455c3333@amazon.com>
Reviewed-by: Shay Agroskin <69dcc34cfc5da012ae45b6a971118c981b82fe05@amazon.com>

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