remove extra methods & add section for the removal

x/staking/CHANGELOG.md

@@ -95,6 +95,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [#17335](https://github.com/cosmos/cosmos-sdk/pull/17335) Remove usage of `"cosmossdk.io/x/staking/types".Infraction_*` in favour of `"cosmossdk.io/api/cosmos/staking/v1beta1".Infraction_` in order to remove dependency between modules on staking
 * [#17655](https://github.com/cosmos/cosmos-sdk/pull/17655) `QueryHistoricalInfo` was adjusted to return `HistoricalRecord` and marked `Hist` as deprecated.
 * [#20295](https://github.com/cosmos/cosmos-sdk/pull/20295) `GetValidatorByConsAddr` now returns the Cosmos SDK `cryptotypes.Pubkey` instead of `cometcrypto.Publickey`. The caller is responsible to translate the returned value to the expected type. 
+    * Remove `CmtConsPublicKey()` and `TmConsPublicKey()` from `Validator` interface and as methods on the `Validator` struct.
 
 ### State Breaking changes
 

x/staking/keeper/validator.go

@@ -601,7 +601,7 @@ func (k Keeper) GetPubKeyByConsAddr(ctx context.Context, addr sdk.ConsAddress) (
 		return nil, err
 	}
 
-	pubkey, err := v.CmtConsPublicKey()
+	pubkey, err := v.ConsPubKey()
 	if err != nil {
 		return nil, err
 	}

x/staking/types/validator.go

@@ -474,16 +474,6 @@ func (v Validator) ConsPubKey() (cryptotypes.PubKey, error) {
 	return pk, nil
 }
 
-// CmtConsPublicKey casts Validator.ConsensusPubkey to cmtprotocrypto.PubKey.
-func (v Validator) CmtConsPublicKey() (cryptotypes.PubKey, error) {
-	pk, err := v.ConsPubKey()
-	if err != nil {
-		return nil, err
-	}
-
-	return pk, nil
-}
-
 // GetConsAddr extracts Consensus key address
 func (v Validator) GetConsAddr() ([]byte, error) {
 	pk, ok := v.ConsensusPubkey.GetCachedValue().(cryptotypes.PubKey)