Update netdb.txt
remove couple of old pool
52.71.124.24:18888
52.80.150.210:13655
52.80.193.246:13654
-52.83.132.76:13655
54.39.28.77:13654
59.110.170.149:13655
83.219.150.219:16775
125.77.30.211:13655
136.243.55.153:16775
139.99.120.77:13655
-139.99.124.23:13655
139.99.124.135:13654
139.99.124.150:16775
139.99.124.162:16775
