mod: bump kvdb to v1.4.15

go.mod

@@ -40,7 +40,7 @@ require (
 	github.com/lightningnetwork/lnd/clock v1.1.1
 	github.com/lightningnetwork/lnd/fn/v2 v2.0.8
 	github.com/lightningnetwork/lnd/healthcheck v1.2.6
-	github.com/lightningnetwork/lnd/kvdb v1.4.14
+	github.com/lightningnetwork/lnd/kvdb v1.4.15
 	github.com/lightningnetwork/lnd/queue v1.1.1
 	github.com/lightningnetwork/lnd/sqldb v1.0.9
 	github.com/lightningnetwork/lnd/ticker v1.1.1
@@ -216,5 +216,3 @@ replace google.golang.org/protobuf => github.com/lightninglabs/protobuf-go-hex-d
 go 1.23.6
 
 retract v0.0.2
-
-replace github.com/lightningnetwork/lnd/kvdb => ./kvdb