Fix issues found by staticcheck

cmd/mtwebmapper/tilesupdater.go

@@ -22,8 +22,6 @@ import (
 	"github.com/bamiaux/rez"
 	"github.com/jackc/pgx/v4"
 
-	"bytes"
-
 	"bitbucket.org/s_l_teichmann/mtsatellite/common"
 )
 
@@ -126,7 +124,7 @@ func (tu *tileUpdater) checkIP(r *http.Request) bool {
 	}
 
 	for i := range tu.ips {
-		if bytes.Compare(tu.ips[i], ip) == 0 {
+		if tu.ips[i].Equal(ip) {
 			return true
 		}
 	}