What you describe could be done with a macro like:
Code:
Sub Demo()
Application.ScreenUpdating = False
Dim Tbl As Table, i As Long
For Each Tbl In ActiveDocument.Tables
With Tbl
For i = .Columns.Count To 2 Step -1
If Len(.Cell(2, i).Range.Text) = 2 Then .Columns(i).Delete
Next
End With
Next
Application.ScreenUpdating = True
End Sub