remove bfb mainnet

Author: JSHan94

mainnets/bfb/assetlist.json

@@ -304,18 +304,6 @@
         "channel_id": "channel-38",
         "version": "ics20-1"
       },
-      {
-        "chain_id": "bfb-1",
-        "port_id": "nft-transfer",
-        "channel_id": "channel-61",
-        "version": "ics721-1"
-      },
-      {
-        "chain_id": "bfb-1",
-        "port_id": "transfer",
-        "channel_id": "channel-60",
-        "version": "ics20-1"
-      },
       {
         "chain_id": "embrmainnet-1",
         "port_id": "nft-transfer",