all: remove unused code

Removed most of the unused code found by an automated tool (the
'unused' tool from https://github.com/dominikh/go-tools).

I did not remove some unused fields in structs and unused methods
because they need more investigation (maybe they were meant to be
used or will in the future).

Change-Id: Ibe048ce22624b609a4067479766d37cceaf6243d
Reviewed-on: https://upspin-review.googlesource.com/10320
Reviewed-by: David Presotto <presotto@gmail.com>
Reviewed-by: Rob Pike <r@golang.org>
2 files changed
tree: fec96ef246af98f35c58a2199c91f4086752c6be
  1. README.md
  2. client/
  3. cmd/
  4. filesystem/
  5. upbox/
README.md

Experimental components

This directory contains components that are experimental or under development.