Deletes fwget Prototype From crostestutils

This was reworked and moved directly into the cros tool `cros fwget`

BUG=b:326315770
TEST=NONE

Change-Id: I8140c0957d16054ba4d706d040ac1100edd3756d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/5315837
Commit-Queue: Sean Carpenter <seancarpenter@google.com>
Tested-by: Sean Carpenter <seancarpenter@google.com>
Reviewed-by: Andrew Luo <aluo@chromium.org>
2 files changed