Removed support for kovan

[zoey-kaiser]

Closes #462

RIP Kovan 😢

Checklist:

• issue number linked above after pound (#)
  • replace "Closes " with "Contributes to" or other if this PR does not close the issue
• issue checkboxes are all addressed
• manually checked my feature / not applicable
• wrote tests / not applicable
• attached screenshots / not applicable

[zoey-kaiser]

including notification-service

In order to remove it properly there I had to remove one of the subscriptions. This was due to it only working on kovan and it was our test subscription until now.

[valiafetisov]

• Can you please also check localhost, staging and production secrets (that are used in drone config) to not point to kovan? If you do, please provide the secret commands here to double check

[zoey-kaiser]

Checked secrets:

• localhost/notification-service
• localhost/frontend
• localhost/bot
• staging/notification-service
• staging/frontend
• staging/bot
• production/notification-service
• production/frontend
• production/bot

I only have access to the localhost secrets. Therefore it would be awesome if you could check them (even tho I do not think any other environments other then localhost would use a test network)

secret export auction-ui/production.auction-ui.k8s.sidestream.tech/frontend
secret export auction-ui/production.auction-ui.k8s.sidestream.tech/notification-service
secret export auction-ui/production.auction-ui.k8s.sidestream.tech/bot
secret export auction-ui/main.auction-ui.k8s.sidestream.tech/frontend
secret export auction-ui/main.auction-ui.k8s.sidestream.tech/notification-service
secret export auction-ui/main.auction-ui.k8s.sidestream.tech/bot

[valiafetisov]

Thanks for the commands! Both auction-ui/main.auction-ui.k8s.sidestream.tech/bot and auction-ui/main.auction-ui.k8s.sidestream.tech/notification-service had ETHEREUM_NETWORK set to kovan (although for the bot this variable is no longer used). Fixed both nevertheless

[zoey-kaiser]

Thanks for the commands! Both auction-ui/main.auction-ui.k8s.sidestream.tech/bot and auction-ui/main.auction-ui.k8s.sidestream.tech/notification-service had ETHEREUM_NETWORK set to kovan (although for the bot this variable is no longer used). Fixed both nevertheless

TYSM! Are we ready for merge then?