Update asset.json for polygon

Author: Kwonhyukjoon

chain/polygon/assets_2.json

@@ -8,15 +8,5 @@
         "decimals": 18,
         "image": "https://raw.githubusercontent.com/cosmostation/chainlist/master/chain/polygon/asset/matic.png",
         "coinGeckoId": "polygon-ecosystem-token"
-    },
-    {
-        "type": "native",
-        "denom": "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
-        "name": "Polygon",
-        "symbol": "MATIC",
-        "description": "Polygon Native Coin",
-        "decimals": 18,
-        "image": "https://raw.githubusercontent.com/cosmostation/chainlist/master/chain/polygon/asset/matic.png",
-        "coinGeckoId": "matic-network"
     }
 ]