multi: fix linter issues

cmd/loop/liquidity.go

@@ -476,7 +476,6 @@ func setParams(ctx *cli.Context) error {
 	// so that it does not need to be manually updated.
 	case categoriesSet:
 		params.FeePpm = 0
-
 	}
 	// Update our parameters to our mutated values.
 	_, err = client.SetLiquidityParams(

cmd/loop/loopout.go

@@ -161,7 +161,7 @@ func loopOut(ctx *cli.Context) error {
 	}
 
 	// Show a warning if a slow swap was requested.
-	warning := ""
+	var warning string
 	if fast {
 		warning = "Fast swap requested."
 	} else {

cmd/loop/lsat.go

@@ -49,7 +49,6 @@ func listAuth(ctx *cli.Context) error {
 
 	tokens := make([]*printableToken, len(resp.Tokens))
 	for i, t := range resp.Tokens {
-
 		mac := &macaroon.Macaroon{}
 		err := mac.UnmarshalBinary(t.BaseMacaroon)
 		if err != nil {

cmd/loop/swaps.go

@@ -60,7 +60,7 @@ func swapInfo(ctx *cli.Context) error {
 		id = ctx.String("id")
 	case ctx.NArg() > 0:
 		id = args[0]
-		args = args.Tail()
+		args = args.Tail() // nolint:wastedassign
 	default:
 		// Show command help if no arguments and flags were provided.
 		return cli.ShowCommandHelp(ctx, "swapinfo")