[infra] Delete bin/try* and tools/chrome_release_branch*

These have been replaced by `sk try` and `sk release-branch`,
respectively.

Change-Id: Idc297dd7c84a87a09f69f310de495f91fcce36b9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/409898
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
6 files changed