[PATCH] Revert "tox: Cleanup '.pyc' files before run"

[Finucane, Stephen]

On 11 Mar 19:28, Stephen Finucane wrote:
> This reverts commit 8e58c29f23b9cc072c003268d641f00084ce3b3b.
> 
> The benefits added by this change did not outweigh the cost it
> introduces in test run time.
> 
> Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>

Merged.