pack/ee/ee.go: cleanup associated with LookupByName
pack/ee/ee.go: cleanup associated with LookupByName

I'm sending two small CLs, mostly to test my use of git.

Change-Id: I9c7e62e04cd47851df66f37eb5705816694a997b
Reviewed-on: https://upspin-review.git.corp.google.com/1471
Reviewed-by: Eduardo Pinheiro <55040cbb39ba395339ae7940d8da6cd97797a4a8@google.com>

upspin/upspin,upspin/upspin