chore: update v6 upgrade handler for v6.1.0

app/upgrades/v6/upgrades.go

@@ -2,12 +2,8 @@ package v6
 
 import (
 	"context"
-	"maps"
-	"slices"
-	"strings"
 
 	upgradetypes "cosmossdk.io/x/upgrade/types"
-	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
 
 	"github.com/milkyway-labs/milkyway/v6/app/keepers"
@@ -25,33 +21,6 @@ func CreateUpgradeHandler(
 			return nil, err
 		}
 
-		// Unwrap the context
-		sdkCtx := sdk.UnwrapSDKContext(ctx)
-
-		// Remove all the markets except from the TIA/USD market
-		markets, err := keepers.MarketMapKeeper.GetAllMarkets(sdkCtx)
-		if err != nil {
-			return nil, err
-		}
-
-		for _, ticker := range slices.Sorted(maps.Keys(markets)) {
-			market := markets[ticker]
-
-			if strings.Contains(ticker, "TIA") {
-				continue
-			}
-
-			err = keepers.MarketMapKeeper.DeleteMarket(sdkCtx, ticker)
-			if err != nil {
-				return nil, err
-			}
-
-			err = keepers.OracleKeeper.RemoveCurrencyPair(sdkCtx, market.Ticker.CurrencyPair)
-			if err != nil {
-				return nil, err
-			}
-		}
-
 		keepers.AccountKeeper.GetModuleAccount(ctx, liquidvestingtypes.ModuleName)
 
 		return vm, nil