Remove www.amin.space from showcase

The author no longer uses Lektor to build the site :-(

See #190.

content/showcase/amin-mesbah/contents.lr

@@ -1,17 +0,0 @@
-name: Amin Mesbah
----
-url: https://www.amin.space
----
-cover_image: frontpage.png
----
-description:
-
-This is my simple personal blog. I write about programming. I also recently
-added a photography section, for which I wrote a little [Lektor plugin][1] that
-fetches image links off my WebDAV file host.
-
-I've found Lektor to be delightfully efficient and extensible, and a pleasure to
-work with. The source files for my site can be found on [GitHub][2].
-
-[1]: https://github.com/mesbahamin/lektor-webdav "lektor-webdav: Lektor plugin to get a list of files from a webDAV server"
-[2]: https://github.com/mesbahamin/amin.space "The GitHub repository for my website's Lektor files"