fix(client/test): Remove unused argument in openSubChannel

Signed-off-by: Sophia Koehler <sophia@perun.network>

Author: sophia1ch

client/test/channel.go

@@ -21,8 +21,6 @@ import (
 	"math/big"
 	"time"
 
-	"perun.network/go-perun/wallet"
-
 	"perun.network/go-perun/channel"
 	"perun.network/go-perun/client"
 	"perun.network/go-perun/log"
@@ -82,7 +80,6 @@ func (ch *paymentChannel) openSubChannel(
 	cfg ExecConfig,
 	initBals []*big.Int,
 	app client.ProposalOpts,
-	bID wallet.BackendID,
 ) *paymentChannel {
 	initAlloc := channel.Allocation{
 		Assets:   cfg.Asset(),

client/test/subchannel.go

@@ -77,7 +77,7 @@ func (r *Susie) exec(_cfg ExecConfig, ledgerChannel *paymentChannel) {
 
 	// stage 2 - open subchannels
 	openSubChannel := func(parentChannel *paymentChannel, funds []*big.Int, app client.ProposalOpts) *paymentChannel {
-		return parentChannel.openSubChannel(rng, cfg, funds, app, cfg.backend[0])
+		return parentChannel.openSubChannel(rng, cfg, funds, app)
 	}
 
 	var subChannels []*paymentChannel

client/test/subchannel_dispute.go

@@ -58,7 +58,7 @@ func (r *DisputeSusie) exec(_cfg ExecConfig, ledgerChannel *paymentChannel) {
 	r.waitStage()
 
 	// Stage 2 - Open sub-channel.
-	subChannel := ledgerChannel.openSubChannel(rng, cfg, cfg.SubChannelFunds[:], client.WithoutApp(), _cfg.Backend()[0])
+	subChannel := ledgerChannel.openSubChannel(rng, cfg, cfg.SubChannelFunds[:], client.WithoutApp())
 	subReq0 := client.NewTestChannel(subChannel.Channel).AdjudicatorReq() // Store AdjudicatorReq for version 0
 	r.waitStage()