Remove old Nomic btc testnet (#2051)

Author: JoseRFelix

osmo-test-5/osmosis.zone_assets.json

@@ -121,26 +121,6 @@
       "base_denom": "uKIMA",
       "osmosis_verified": true
     },
-    {
-      "chain_name": "nomictestnet",
-      "base_denom": "usat",
-      "osmosis_verified": true,
-      "_comment": "$nBTC",
-      "override_properties": {
-        "ibc": {
-          "type": "ibc",
-          "counterparty": {
-            "chain_name": "nomictestnet",
-            "base_denom": "usat",
-            "channel_id": "channel-1"
-          },
-          "chain": {
-            "channel_id": "channel-9025",
-            "path": "transfer/channel-9025/usat"
-          }
-        }
-      }
-    },
     {
       "chain_name": "nomictestnet",
       "base_denom": "usat",