feat(mint): remove legacy store migration

x/mint/keeper/migrations.go

@@ -4,7 +4,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
 	"github.com/okp4/okp4d/x/mint/exported"
-	v2 "github.com/okp4/okp4d/x/mint/migrations/v2"
+	v3 "github.com/okp4/okp4d/x/mint/migrations/v3"
 )
 
 type Migrator struct {
@@ -19,6 +19,6 @@ func NewMigrator(keeper Keeper, legacySubspace exported.Subspace) Migrator {
 	}
 }
 
-func (m Migrator) Migrate1to2(ctx sdk.Context) error {
-	return v2.MigrateStore(ctx, m.keeper.storeKey, m.keeper.cdc, m.legacySubspace)
+func (m Migrator) Migrate2to3(ctx sdk.Context) error {
+	return v3.MigrateStore(ctx, m.keeper.storeKey, m.keeper.cdc, m.legacySubspace)
 }

x/mint/migrations/v3/migrations.go

@@ -0,0 +1,31 @@
+package v3
+
+import (
+	"github.com/cosmos/cosmos-sdk/codec"
+	storetypes "github.com/cosmos/cosmos-sdk/store/types"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	"github.com/okp4/okp4d/x/mint/exported"
+)
+
+// MigrateStore migrates the x/mint module state from the consensus version 2 to
+// version 3.
+func MigrateStore(ctx sdk.Context,
+	storeKey storetypes.StoreKey,
+	cdc codec.BinaryCodec,
+	legacySubspace exported.Subspace,
+) error {
+	logger := ctx.Logger().
+		With("module", "mint").
+		With("migration", "v3")
+
+	logger.Debug("starting module migration")
+
+	logger.Debug("migrate mint params")
+
+	// TODO:
+
+	logger.Debug("module migration done")
+
+	return nil
+}