removed unnecesary async decorators
removed unnecesary async decorators

ccxt/ccxt,tritoanst/ccxt,tritoanst/ccxt,aiueogawa/ccxt,tritoanst/ccxt,aiueogawa/ccxt,aiueogawa/ccxt,tritoanst/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,aiueogawa/ccxt,ccxt/ccxt