DAPI: Call to `sendrawtransaction` duplicated for redundant specific case

[kxcd]

https://github.com/dashpay/platform/blob/ed354ca52969676f8231765fc04bbe02b1d9ba25/packages/dapi/lib/externalApis/dashcore/rpc.js#L271C1-L280C1

This method should be deleted, all transactions posted to the Dash network are automatically InstantSend (IX), the parameter set in this version is simply ignored by Dash Core.