Macro deletes tabs, disable warning box

I'm creating a workbook with 5 identical tabs for data entry in a production facility. each tab represents a different production line. With some help from the macro recorder i've created a macro to make 4 clones of my main tab every time the workbook is opened. This helps save me time in having to distribute updates across the 4 other tabs when they occur. The macro works fine (although if anyone knows a simpler way of writing it I'd love to know it ) except that after each worksheet is deleted a message box pops up that says:

Data may exist in the sheet(s) selected for deletion. To permanently delete the data, press Delete.

I'd like to bypass this if possible so that my users don't have to go through 4 of these each time they open the work book. Does anyone know if / how this can be accomplished?

Thank you!

Private Sub Workbook_Open()
    Sheets("Sheet1 (5)").Select
    ActiveWindow.SelectedSheets.Delete
    Sheets("Sheet1 (4)").Select
    ActiveWindow.SelectedSheets.Delete
    Sheets("Sheet1 (3)").Select
    ActiveWindow.SelectedSheets.Delete
    Sheets("Sheet1 (2)").Select
    ActiveWindow.SelectedSheets.Delete
    Sheets("Sheet1").Select
    Sheets("Sheet1").Copy After:=Sheets(1)
    Sheets("Sheet1").Select
    Sheets("Sheet1").Copy After:=Sheets(2)
    Sheets("Sheet1").Select
    Sheets("Sheet1").Copy After:=Sheets(3)
    Sheets("Sheet1").Select
    Sheets("Sheet1").Copy After:=Sheets(4)
End Sub

Private Sub Workbook_Open()
  Application.DisplayAlerts = False
   Sheets("Sheet1 (5)").Delete
    Sheets("Sheet1 (4)").Delete
    Sheets("Sheet1 (3)").Delete
    Sheets("Sheet1 (2)").Delete
    Sheets("Sheet1").Copy After:=Sheets(1)
    Sheets("Sheet1").Copy After:=Sheets(2)
    Sheets("Sheet1").Copy After:=Sheets(3)
    Sheets("Sheet1").Copy After:=Sheets(4)
    Application.DisplayAlerts = True
End Sub

Thank you very much!