Un-vendor all libraries

Context

Corresponding opam-repo MR opam-repository!347 (merged)

In particular:

• Remove patch against ocaml-hidapi and unvendor it.
• unvendor ledgerwallet-tezos

fixes #2197 (closed)

Manually testing the MR

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR