morph mainnet: trim genesis validators 7→3 (current operational set)

Sync genesis.json from morph-l2/run-morph-node mainnet/node-data/config/,
keeping only node0–node2 to match the live 3-validator network (config.toml
already lists 3 persistent_peers). Removes stale node3–node6 entries.

morph/mainnet/node-data/config/genesis.json

@@ -54,42 +54,6 @@
         },
         "power": "1",
         "name": "node2"
-      },
-      {
-        "address": "CCB261D3D07500A041CBF8DBDA8BAF6C30D442D9",
-        "pub_key": {
-            "type": "tendermint/PubKeyEd25519",
-            "value": "RTumlijhEDvRrmitZjIAUnajUI0SztEP1pFdVVH/Ct4="
-        },
-        "power": "1",
-        "name": "node3"
-      },
-      {
-        "address": "4321301E015EB29A934841DDF3F1C8DEF2FAA1B5",
-        "pub_key": {
-            "type": "tendermint/PubKeyEd25519",
-            "value": "vn5xGoYJVQVbvEl00qr+JpKw0+zrp3INKNKbJfNLJ6E="
-        },
-        "power": "1",
-        "name": "node4"
-      },
-      {
-        "address": "83ED2116E889494AB9017530EF8D833DF8358B07",
-        "pub_key": {
-            "type": "tendermint/PubKeyEd25519",
-            "value": "d6GgF1neO2k+wajm0IOgW6ymGhf6q7F1RJpjtwgFbHk="
-        },
-        "power": "1",
-        "name": "node5"
-      },
-      {
-        "address": "8E04413FCC1BA73C7AEB86D9A1479C3BE47012CE",
-        "pub_key": {
-            "type": "tendermint/PubKeyEd25519",
-            "value": "aO4/nCUoLHHYHjTUGI/CUUpByXuMtdkJzHimJLHifLo="
-        },
-        "power": "1",
-        "name": "node6"
       }
     ],
     "app_hash": ""