les: remove (#2211)

LES was [removed from
geth](ethereum/go-ethereum#28586) and is
generally no longer supported on the network.

nimbus/config.nim

@@ -117,7 +117,6 @@ type
  ## Protocol flags
  Eth ## enable eth subprotocol
  #Snap ## enable snap sub-protocol
- Les ## enable les subprotocol
 
  RpcFlag* {.pure.} = enum
  ## RPC flags
@@ -373,8 +372,8 @@ type
 
  protocols {.
  desc: "Enable specific set of server protocols (available: Eth, " &
- " Les, None.) This will not affect the sync mode"
- # " Snap, Les, None.) This will not affect the sync mode"
+ " None.) This will not affect the sync mode"
+ # " Snap, None.) This will not affect the sync mode"
  defaultValue: @[]
  defaultValueDesc: $ProtocolFlag.Eth
  name: "protocols" .}: seq[string]
@@ -635,7 +634,6 @@ proc getProtocolFlags*(conf: NimbusConf): set[ProtocolFlag] =
  for item in repeatingList(conf.protocols):
  case item.toLowerAscii()
  of "eth": result.incl ProtocolFlag.Eth
- of "les": result.incl ProtocolFlag.Les
  # of "snap": result.incl ProtocolFlag.Snap
  of "none": noneOk = true
  else:

nimbus/nimbus.nim

@@ -28,8 +28,7 @@ import
  ./core/clique/clique_desc,
  ./core/clique/clique_sealer,
  ./sync/protocol,
- ./sync/handlers,
- ./sync/protocol/les_protocol
+ ./sync/handlers
 
 when defined(evmc_enabled):
  import transaction/evmc_dynamic_loader
@@ -131,8 +130,6 @@ proc setupP2P(nimbus: NimbusNode, conf: NimbusConf,
  nimbus.ethNode.peerPool,
  nimbus.chainRef,
  nimbus.txPool)
- of ProtocolFlag.Les:
- nimbus.ethNode.addCapability les
  #of ProtocolFlag.Snap:
  # nimbus.ethNode.addSnapHandlerCapability(
  # nimbus.ethNode.peerPool,