Niraj Tolia 7c8c464fea
Fix Corso panics in Docker images (#2543)
## Description

The `KOPIA_CACHE_DIRECTORY` env variable causes Corso to panic even if `$CORSO_HOME/kopia/cache` exists.
Removing it fixes the builds but I am unsure of any side effects.

## Does this PR need a docs update or release note?

- [x]  Yes, it's included

## Type of change

- [x] 🐛 Bugfix

## Issue(s)

* #2529 

## Test Plan

- [x] 💪 Manual
2023-02-17 05:29:58 +00:00
..
2022-12-13 21:01:55 +00:00