multi: run gosimports

lntest/mock/chainnotifier.go

@@ -3,7 +3,6 @@ package mock
 import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/wire"
-
 	"github.com/lightningnetwork/lnd/chainntnfs"
 )
 

lntest/mock/spendnotifier.go

@@ -4,7 +4,6 @@ import (
 	"sync"
 
 	"github.com/btcsuite/btcd/wire"
-
 	"github.com/lightningnetwork/lnd/chainntnfs"
 )
 

lntest/mock/walletcontroller.go

@@ -15,7 +15,6 @@ import (
 	"github.com/btcsuite/btcwallet/waddrmgr"
 	"github.com/btcsuite/btcwallet/wallet/txauthor"
 	"github.com/btcsuite/btcwallet/wtxmgr"
-
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 )