Update new-config templates to use USDT by default

freqtrade/templates/subtemplates/exchange_binance.j2

@@ -8,21 +8,6 @@
         "rateLimit": 200
     },
     "pair_whitelist": [
-        "ALGO/BTC",
-        "ATOM/BTC",
-        "BAT/BTC",
-        "BCH/BTC",
-        "BRD/BTC",
-        "EOS/BTC",
-        "ETH/BTC",
-        "IOTA/BTC",
-        "LINK/BTC",
-        "LTC/BTC",
-        "NEO/BTC",
-        "NXS/BTC",
-        "XMR/BTC",
-        "XRP/BTC",
-        "XTZ/BTC"
     ],
     "pair_blacklist": [
         "BNB/BTC",