fix upgrade name (#371)

This pull request includes minor updates related to versioning, code
cleanup, and the stargate whitelist configuration. The main changes
involve updating the upgrade version, removing commented-out code and
unused imports, and cleaning up the initialization of the stargate
whitelist.

Versioning update:

* Changed the upgrade name constant from `"v20"` to `"v21"` in
`app/upgrades.go` to reflect the new upgrade version.

Code cleanup:

* Removed commented-out import statements for unused IBC transfer types
in `wasmbindings/stargate_whitelist.go`.
* Removed commented-out code and a TODO related to IBC queries from the
initialization of the stargate whitelist in
`wasmbindings/stargate_whitelist.go`.
* Removed an outdated TODO comment about replacing IBC hooks with
callbacks in `app/app.go`.

Author: 2xburnt

app/app.go

@@ -604,7 +604,6 @@ func NewWasmApp(
 		authtypes.NewModuleAddress(govtypes.ModuleName).String(),
 	)
 
-	// TODO: Replace ibc hooks with callbacks?
 	// Configure the hooks keeper
 	// hooksKeeper := ibchookskeeper.NewKeeper(
 	// 	keys[ibchookstypes.StoreKey],

app/upgrades.go

@@ -12,7 +12,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/types/module"
 )
 
-const UpgradeName = "v20"
+const UpgradeName = "v21"
 
 func (app *WasmApp) RegisterUpgradeHandlers() {
 	upgradeInfo, err := app.UpgradeKeeper.ReadUpgradeInfoFromDisk()

wasmbindings/stargate_whitelist.go

@@ -7,8 +7,6 @@ import (
 	wasmvmtypes "github.com/CosmWasm/wasmvm/v3/types"
 
 	"github.com/cosmos/gogoproto/proto"
-	// nolint: gci
-	// ibctransfertypes "github.com/cosmos/ibc-go/v10/modules/apps/transfer/types"
 
 	feegranttypes "cosmossdk.io/x/feegrant"
 
@@ -37,10 +35,6 @@ var stargateWhitelist sync.Map
 // In the future we may want to find a better way to keep these in sync
 
 func init() {
-	// ibc queries
-	// TODO: fix
-	// setWhitelistedQuery("/ibc.applications.transfer.v1.Query/DenomTrace", &ibctransfertypes.QueryDenomTraceResponse{})
-
 	// cosmos-sdk queries
 
 	// auth