old_contents: # -*- coding: utf-8 -*-
  known_chains = {
      "BTS": {
          "chain_id": "4018d7844c78f6a6c41c6a552b898022310fc5dec06da467ee7905a8dad512c8",
          "core_symbol": "BTS",
          "prefix": "BTS",
      },
      "CTS": {
          "chain_id": "53952fc10d52a3af6d572a298e8f99a0a2e7afd0f7dbad354d8d65e8c36c962d",
          "core_symbol": "CTS",
          "prefix": "CTS",
      },
      "TEST": {
          "chain_id": "39f5e2ede1f8bc1a3a54a7914414e3779e33193f1f5693510e73cb7a87617447",
          "core_symbol": "TEST",
          "prefix": "TEST",
      },
  }
  
new_contents: # -*- coding: utf-8 -*-
  known_chains = {
      "BTS": {
          "chain_id": "4018d7844c78f6a6c41c6a552b898022310fc5dec06da467ee7905a8dad512c8",
          "core_symbol": "BTS",
          "prefix": "BTS",
      },
      "TEST": {
          "chain_id": "39f5e2ede1f8bc1a3a54a7914414e3779e33193f1f5693510e73cb7a87617447",
          "core_symbol": "TEST",
          "prefix": "TEST",
      },
  }
  
subject: Remove CTS