Revert "Add no-cache-dir to tox install"

[AnandInguva]

This reverts commit d38fdd8.

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[AnandInguva]

R: @damccorm

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[damccorm]

Thanks - I'm fine merging without waiting for CI since this is a 1:1 revert of the last commit