Remove SkRemotableFontMgr

This was an early attempt at properly handling fonts in a sandbox.
Chromium did in fact run with this. In some ways it is still better than
how Chromium currently handles fonts in the sandbox. However, this is
currently unused and if written today would be done much differently.

Change-Id: Ief8a72260e26341745a69406934094fc39487fac
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/841658
Auto-Submit: Ben Wagner <bungeman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
8 files changed