2021-09-28 bitCNY1.0 price feed producers list update

[abit]

2021-09-28 bitCNY1.0 price feed producers list update: temporarily removed "clone" and "nexus01" from price feed producers list.

Reason:
The price feeder producers need time to adjust their price feed scripts to correctly feed bitCNY1.0 price.

Current list:
1.2.183     hiquanta
1.2.25010   bhuz
1.2.14035   xn-delegate
1.2.738675  xbtsio-wallet
1.2.987999  zapata42-witness
1.2.1035733 syalon
1.2.1665620 china911 (jie@gdex)
1.2.1685373 gbac-ety001