[Optimisation] fn deleteOrder() has unneeded parameter

[josojo]

deleteOrder() has an input variable "quoteId" of the ethflow.Data. And this variable is not needed. We could optimize for gas and take the variable out.

But IMO, it's not worth it, as this would require defining another EthflowOrder library data type and the gas overhead is quite low

[bh2smith]

Was this parameter introduced for auxiliary or enriched on chain analytical purposes? If so, then I would be in favour of keeping it. Otherwise feel free to remove it. Did you create the issue so someone else (like me) might remove it?