chore: remove unused SanitizeLabel function and tests

tasks/actorstate/market/context.go

@@ -3,11 +3,8 @@ package market
 import (
 	"context"
 	"fmt"
-	"strings"
-	"unicode/utf8"
 
 	"github.com/filecoin-project/lotus/chain/types"
-	"golang.org/x/text/runes"
 
 	"github.com/filecoin-project/lily/chain/actors/adt"
 	"github.com/filecoin-project/lily/tasks/actorstate"
@@ -61,19 +58,3 @@ func NewMarketStateExtractionContext(ctx context.Context, a actorstate.ActorInfo
 func (m *MarketStateExtractionContext) IsGenesis() bool {
 	return m.CurrTs.Height() == 0
 }
-
-// SanitizeLabel ensures:
-// - s is a valid utf8 string by removing any ill formed bytes.
-// - s does not contain any nil (\x00) bytes because postgres doesn't support storing NULL (\0x00) characters in text fields.
-func SanitizeLabel(s string) string {
-	if s == "" {
-		return s
-	}
-	s = strings.Replace(s, "\000", "", -1)
-	if utf8.ValidString(s) {
-		return s
-	}
-
-	tr := runes.ReplaceIllFormed()
-	return tr.String(s)
-}