feat: remove exam-env env var

[ShaunSHamilton]

Related to freeCodeCamp/freeCodeCamp#63909

[github-actions]

Run Details - tfws-ops-test

Terraform Cloud Plan Output

Plan: 6 to add, 0 to change, 0 to destroy.

Details : https://app.terraform.io/app/freecodecamp/workspaces/tfws-ops-test/runs/run-bZBbiGnzxLySY34y

Warning

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