Private Sub Delete_Click()
Dim vProtectionType As Variant, strPassword As String

    vProtectionType = ActiveDocument.ProtectionType

    If vProtectionType <> wdNoProtection Then
        strPassword = ""    'Insert password here
        ActiveDocument.Unprotect Password:=strPassword
    End If
    Application.ScreenUpdating = False
    Dim Tbl As Table, cel As Cell, r As Long, x As Long
    Dim bDel As Boolean, CCtrl As ContentControl
    With ActiveDocument
        For Each Tbl In .Tables
            For r = Tbl.Rows.Count To 1 Step -1
                With Tbl.Rows(r)
                    If Len(.Range.Text) = .Cells.Count * 2 + 2 Then
                        .Delete
                    Else
                        bDel = True
                        For Each cel In .Cells
                            If Len(cel.Range.Text) > 2 Then
                                If .Range.ContentControls.Count = 0 Then
                                    bDel = False: Exit For
                                Else
                                    For Each CCtrl In .Range.ContentControls
                                        If CCtrl.ShowingPlaceholderText = False Then
                                            bDel = False: Exit For
                                        End If
                                        x = x + Len(CCtrl.Range.Text)
                                    Next
                                    If x + 2 <= Len(cel.Range.Text) Then
                                        bDel = False: Exit For
                                    End If
                                End If
                            End If
                        Next cel
                        If bDel = True Then Tbl.Rows(r).Delete
                    End If
                End With
            Next r
        Next Tbl
    End With
    If vProtectionType > -1 Then
        ActiveDocument.Protect Type:=vProtectionType, Password:=strPassword
    End If
    Set cel = Nothing: Set Tbl = Nothing
    Application.ScreenUpdating = True
End Sub