MAINTAINERS: remove Organization Owner @marchersimon

[kbdharun]

Hi, @marchersimon! As you know, our community roles documentation defines processes for keeping the list of organization members in sync with the actual maintenance team.
Since you haven't been active in the project for a while now, we'll be relieving you from the maintainer responsibilities.

In practice, not much will change on your side, since you'll remain a collaborator in the repos you have been active in.
That means you will keep the ability to commit, merge PRs, label and close issues, etc., whenever you feel so inclined.
If you don't, that's all right too!
Every bit of work you already did for the tldr-pages project was a voluntary gift of your time to this community, which is deeply appreciated.
Your efforts have contributed to a project which helps hundreds of people every day — be proud of it!

And of course, you're welcome back anytime as an active maintainer, if you so choose — in which case, just let us know and we'll re-add you to the organization, in accordance to the principles of our governance guidelines.
In any case, we wish you the best of luck in your new endeavors!

[kbdharun]

Since there hasn't been any response for more than 2 weeks as highlighted in the COMMUNITY ROLES file. I am converting your role to an Outside collaborator. Thanks for all your work so far.