Revert "Hash-based dex cache type array."

Reverting to work around some programs crashing with
    Check failed: handle_scope_iface.Get() != nullptr.
though the reason for the failure not yet understood.

Test: m test-art-host
Bug: 34839984
Bug: 30627598
Bug: 34659969
Bug: 30419309

This reverts commit ec786228.

Change-Id: Ifded663633082f1e59e5b6ff2e026dc559bd6b82