[R] Remove tiledb dependency for R package

[ivirshup]

Motivation

My understanding is that tiledbsoma no longer relies on the tiledb package so that we need to deal with conflicting versions less. However, the cellxgene_census package still has a hard dependency on tiledb.

Definition of Done

Remove the tiledb dep

Tasks

Detail the specific tasks that can be used to accomplish the desired changes.
If detailed steps cannot be provided at this time, please file a Tech Proposal instead.

• Remove tiledb dep
• Don't break things

@mlin or @johnkerl we expect this to just be removing the dependency, right?

[johnkerl]

My understanding is that tiledbsoma no longer relies on the tiledb package so that we need to deal with conflicting versions less. However, the cellxgene_census package still has a hard dependency on tiledb.

@ivirshup this is still a work in progress for R. For Python, it's largely complete.