lnpeer: cleanup imports

diff --git a/electrum/lnpeer.py b/electrum/lnpeer.py
index ea0d16e..a04eaee 100644
--- a/electrum/lnpeer.py
+++ b/electrum/lnpeer.py
@@ -24,7 +24,7 @@ from aiorpcx import ignore_after
 from .crypto import sha256, sha256d, privkey_to_pubkey
 from . import bitcoin, util
 from . import constants
-from .util import (bfh, log_exceptions, ignore_exceptions, chunks, OldTaskGroup,
+from .util import (log_exceptions, ignore_exceptions, chunks, OldTaskGroup,
                    UnrelatedTransactionException, error_text_bytes_to_safe_str, AsyncHangDetector,
                    NoDynamicFeeEstimates, event_listener, EventListener)
 from . import transaction
@@ -36,7 +36,7 @@ from .lnonion import (new_onion_packet, OnionFailureCode, calc_hops_data_for_pay
                       OnionPacket, construct_onion_error, obfuscate_onion_error, OnionRoutingFailure,
                       ProcessedOnionPacket, UnsupportedOnionPacketVersion, InvalidOnionMac, InvalidOnionPubkey,
                       OnionFailureCodeMetaFlag)
-from .lnchannel import Channel, RevokeAndAck, RemoteCtnTooFarInFuture, ChannelState, PeerState, ChanCloseOption, CF_ANNOUNCE_CHANNEL
+from .lnchannel import Channel, RevokeAndAck, ChannelState, PeerState, ChanCloseOption, CF_ANNOUNCE_CHANNEL
 from . import lnutil
 from .lnutil import (Outpoint, LocalConfig, RECEIVED, UpdateAddHtlc, ChannelConfig,
                      RemoteConfig, OnlyPubkeyKeypair, ChannelConstraints, RevocationStore,
@@ -48,16 +48,15 @@ from .lnutil import (Outpoint, LocalConfig, RECEIVED, UpdateAddHtlc, ChannelConf
                      IncompatibleLightningFeatures, derive_payment_secret_from_payment_preimage,
                      ChannelType, LNProtocolWarning, validate_features,
                      IncompatibleOrInsaneFeatures, FeeBudgetExceeded,
-                     GossipForwardingMessage, GossipTimestampFilter)
-from .lnutil import FeeUpdate, channel_id_from_funding_tx, PaymentFeeBudget
-from .lnutil import serialize_htlc_key, Keypair
+                     GossipForwardingMessage, GossipTimestampFilter, channel_id_from_funding_tx,
+                     PaymentFeeBudget, serialize_htlc_key, Keypair)
 from .lntransport import LNTransport, LNTransportBase, LightningPeerConnectionClosed, HandshakeFailed
 from .lnmsg import encode_msg, decode_msg, UnknownOptionalMsgType, FailedToParseMsg
 from .interface import GracefulDisconnect
 from .lnrouter import fee_for_edge_msat
 from .json_db import StoredDict
 from .invoices import PR_PAID
-from .fee_policy import FEE_LN_ETA_TARGET, FEE_LN_MINIMUM_ETA_TARGET, FEERATE_PER_KW_MIN_RELAY_LIGHTNING
+from .fee_policy import FEE_LN_ETA_TARGET, FEERATE_PER_KW_MIN_RELAY_LIGHTNING
 from .trampoline import decode_routing_info
 
 if TYPE_CHECKING: