If you use Vim or Neovim, you've probably found that you can't save the modifications you've made to a file, because you don't have write permissions or the file doesn't belong to you.

Keep reading Save file as superuser in Vim

To delete cells the only option is removing its borders. Here I have a table from which I want to remove three of the top cells that are leftover:

To do this, click on the Borders button that appears below when we select the table cells we want to delete and then click on No Borders, as I do in the following image:

In case you get lost, here is also a video demonstration:

Here is the result: