readme: drop mention of the Sway project

wlroots has historically been started as a Sway project, but these
days many wlroots contributors are working on other compositors.
wlroots now also has its own namespace on gitlab.freedesktop.org.

Let's remove the mention about Sway in the README, to make it clearer
that Sway isn't treated in a special manner when it comes to wlroots
development.

README.md

@@ -32,9 +32,8 @@ to implement yourself.
 Check out our [wiki] to get started with wlroots. Join our IRC channel:
 [#sway-devel on Libera Chat].
 
-wlroots is developed under the direction of the [sway] project. A variety of
-[wrapper libraries] are available for using it with your favorite programming
-language.
+A variety of [wrapper libraries] are available for using it with your favorite
+programming language.
 
 ## Building
 
@@ -77,7 +76,6 @@ See [CONTRIBUTING.md].
 [Wayland]: https://wayland.freedesktop.org/
 [wiki]: https://gitlab.freedesktop.org/wlroots/wlroots/-/wikis/Getting-started
 [#sway-devel on Libera Chat]: https://web.libera.chat/gamja/?channels=#sway-devel
-[Sway]: https://github.com/swaywm/sway
 [wrapper libraries]: https://gitlab.freedesktop.org/wlroots/wlroots/-/wikis/Projects-which-use-wlroots#wrapper-libraries
 [libseat]: https://git.sr.ht/~kennylevinsen/seatd
 [CONTRIBUTING.md]: https://gitlab.freedesktop.org/wlroots/wlroots/-/blob/master/CONTRIBUTING.md