【VBA】重複するデータを日付が新しいデータだけ残す

Sub VBA Sample01()

'2行目が項目
'1列目が主キー(商品コードなど)
'2列目が日付、3列目が時刻、4列目～BF列までが各項目

    Dim Wsht1 As Worksheet
    Dim MxRw As Long
    Dim ix As Long

    Set Wsht1=Worksheets("Sheet1")
    MxRw=Wsht1.Range("A65535").End(xlUp).Row
    Wsht1.Range("A2:BF").Sort _
        Key1:=Wsht1.Columns("A"), order1:=xlAscending, _
        Key2:=Wsht1.Columns("B"), order2:=xlDescending, _
        Key3:=Wsht1.Columns("C"), order3:=xlDescending, _
        .Header:=xlYes

    For ix=MxRw To 3 Step-1
        If Wsht1.Cells(ix,1)=Wsht1.Cells(ix-1,1) Then
        Wsht1.Cells(ix,1).EntireRow.Delete
        End if
    Next ix

End Sub