Remove the data from Decimal

Consider not to change your data. In most cases it is preferrable to keep the original cell value at 10.2352 but display 10 in the cell. Even if you wish to use the integer 10 in onward calculations you could use ROUND(10.2352, 0) instead of a simple reference and still maintain your original data unchanged.

Change the displayed value using cell formatting: Format Cells > Number > Number and set Decimal places to 0. Note that this setting would automatically round the display 5/4, meaning 10.5 will be displayed as 11, 10.49 as 10. The ROUND function, either on the worksheet or in VBA, would do the same.

If you wish to apply this format using VBA you might use this code.

    With Worksheets("Sheet1")
        .Range(.Cells(2, "D"), .Cells(.Rows.Count, "D").End(xlUp)).NumberFormat = "0"
    End With

Change the sheet name to the name to match the name of the worksheet on which you wish to set the number format. use the format string "#,##0" if you need a thousands separator.