remove unused misbehaviour event attribute

CHANGELOG.md

@@ -44,7 +44,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### API Breaking
 
-* (modules) [\#166](https://github.com/cosmos/ibc-go/pull/166) Remove GetHeight from the misbehaviour interface.
+* (modules) [\#166](https://github.com/cosmos/ibc-go/pull/166) Remove GetHeight from the misbehaviour interface. The `consensus_height` attribute has been removed from Misbehaviour events.
 * (modules) [\#162](https://github.com/cosmos/ibc-go/pull/162) Remove deprecated Handler types in core IBC and the ICS 20 transfer module. 
 * (modules/core) [\#161](https://github.com/cosmos/ibc-go/pull/161) Remove Type(), Route(), GetSignBytes() from 02-client, 03-connection, and 04-channel messages.
 * (modules) [\#140](https://github.com/cosmos/ibc-go/pull/140) IsFrozen() client state interface changed to Status(). gRPC `ClientStatus` route added.

docs/migrations/ibc-migration-043.md

@@ -108,6 +108,8 @@ The `OnRecvPacket` callback has been modified to only return the acknowledgement
 
 The `packet_data` attribute has been deprecated in favor of `packet_data_hex`, in order to provide standardized encoding/decoding of packet data in events. While the `packet_data` event still exists, all relayers and IBC Event consumers are strongly encouraged to switch over to using `packet_data_hex` as soon as possible.
 
+The `consensus_height` attribute has been removed in the Misbehaviour event emitted. IBC clients no longer have a frozen height and misbehaviour does not necessarily have an associated height.
+
 ## Relevant SDK changes
 
 * (codec) [\#9226](https://github.com/cosmos/cosmos-sdk/pull/9226) Rename codec interfaces and methods, to follow a general Go interfaces:

modules/core/keeper/msg_server.go

@@ -123,7 +123,6 @@ func (k Keeper) SubmitMisbehaviour(goCtx context.Context, msg *clienttypes.MsgSu
 			clienttypes.EventTypeSubmitMisbehaviour,
 			sdk.NewAttribute(clienttypes.AttributeKeyClientID, msg.ClientId),
 			sdk.NewAttribute(clienttypes.AttributeKeyClientType, misbehaviour.ClientType()),
-			sdk.NewAttribute(clienttypes.AttributeKeyConsensusHeight, clienttypes.NewHeight(0, 1).String()), // DEPRECATED
 		),
 	)