remove built-in Ropsten support

[tersec]

https://blog.ethereum.org/2022/06/21/testnet-deprecation

Ropsten: Q4 2022

The Ropsten testnet, which ran through The Merge on June 8, 2022, will be shut down in Q4 2022.

Developers who currently use Ropsten as a staging/testing environment should migrate to Goerli or Sepolia.

https://blog.ethereum.org/2022/07/27/goerli-prater-merge-announcement

Additionally, you should note that all testnets aside from Sepolia and Goerli will be deprecated post-merge. If you are a user of Ropsten, Rinkeby or Kiln, you should plan to migrate to Goerli or Sepolia.

https://blog.ethereum.org/2022/08/03/sepolia-post-merge-upgrade

Ropsten will not be upgraded since it is now considered deprecated, along with Rinkeby and Kiln. See this post for more details on their deprecation schedule.

https://blog.ethereum.org/2022/08/24/mainnet-merge-announcement

Additionally, please note that all testnets aside from Sepolia and Goerli will be deprecated post-merge. If you are a user of Ropsten, Rinkeby or Kiln, you should plan to migrate to Goerli or Sepolia.

https://blog.ethereum.org/2022/09/09/kiln-shutdown

Ropsten and Rinkeby are also deprecated and scheduled to be sunset in Q4 2022 and Q3 2023 respectively.

If people still want to run a Nimbus client on Ropsten, they can, by pointing it to https://github.com/eth-clients/merge-testnets/tree/main/ropsten-beacon-chain as a runtime network configuration.

[github-actions]

Unit Test Results

         9 files  ±0       873 suites  ±0   23m 18s ⏱️ - 1m 28s
  2 704 tests ±0    2 511 ✔️ ±0  193 💤 ±0  0 ❌ ±0 
11 783 runs  ±0  11 564 ✔️ ±0  219 💤 ±0  0 ❌ ±0 

Results for commit 2ad7738. ± Comparison against base commit 32039e9.

♻️ This comment has been updated with latest results.

[arnetheduck]

From blog post:

Then, by the end of the year, Ropsten will be as well.

So let's hold this one until next release

[tersec]

From blog post:

Then, by the end of the year, Ropsten will be as well.

So let's hold this one until next release

Sure

[tersec]

https://blog.ethereum.org/2022/11/30/ropsten-shutdown-announcement

As previously announced, the Ropsten network has been deprecated and will be shut down in the coming weeks. Over the past few months, infrastructure providers have gradually stopped supporting the network and validator participation rates have been steadily declining.

The vast majority of remaining validator nodes will be shut down during the December 15-31, 2022 period. After this, Ropsten will no longer be supported by client, testing or infrastructure teams.