Sub Demo()
Application.ScreenUpdating = False
With ActiveDocument.Range
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = "[A-Z]."
    .Replacement.Text = ""
    .Font.Bold = False
    .Font.Underline = wdUnderlineNone
    .Forward = True
    .Wrap = wdFindStop
    .Format = True
    .MatchWildcards = True
    .Execute
  End With
  Do While .Find.Found
    With .Duplicate
      If .Start = .Paragraphs.First.Range.Start Then
        .Paragraphs.First.Range.Text = vbNullString
      End If
    End With
    .Collapse wdCollapseEnd
    .Find.Execute
  Loop
End With
Application.ScreenUpdating = True
End Sub