MODE-2323 Removed the proxy layer and delta write functionality in Schematic

ModeShape's is no longer using Infinispan in ways where these pieces of functionality are useful.
Removing them should simplify the logic to represent more of what we're actually doing. See MODE-2323 for details.
Okay, so do we want to use the `FAIL_SILENTLY` flag? That seems like a bad idea. All of the locking code is centralized, so I can easily check the cache configuration for whether explicit locking is enabled.