Remove Env Vars for AMS Implementation

[lucas-phillips28]

Jira link

See S28-3371

Change description

• Remove env vars only used as part of AMS implementation (ticket part of AMS decommissioning work)

DO NOT MERGE BEFORE hmcts/pre-api#782

Testing done

🤖AEP PR SUMMARY🤖

apps/pre/pre-api-cron-cleanup-live-events/demo.yaml

• Updated schedule to "30 17 * * *"

apps/pre/pre-api-cron-cleanup-live-events/stg.yaml

• Updated schedule to "30 17 * * *"

apps/pre/pre-api-cron-cleanup-live-events/test.yaml

• Updated schedule to "30 17 * * *"

apps/pre/pre-api-cron-cleanup-streaming-locators/demo.yaml

• Updated schedule to "30 18 * * *"

apps/pre/pre-api-cron-cleanup-streaming-locators/stg.yaml

• Updated schedule to "30 18 * * *"

apps/pre/pre-api-cron-cleanup-streaming-locators/test.yaml

• Updated schedule to "30 18 * * *"

apps/pre/pre-api/demo.yaml

• Removed several environment variables

apps/pre/pre-api/prod.yaml

• Removed several environment variables

apps/pre/pre-api/stg.yaml

• Removed several environment variables

apps/pre/pre-api/test.yaml

• Removed several environment variables

[satyachundur]

LGTM