Mirrors: Remove CD and DVD distributors

The last few years, there is only one distributor of FreeBSD discs,
and they only update their website if I send them an email, so I think
they are not actually selling any and nobody wants this.

Discussed with:	cperciva

documentation/content/en/books/handbook/mirrors/_index.adoc

@@ -3,8 +3,8 @@ title: Appendix A. Obtaining FreeBSD
 part: Part V. Appendices
 prev: books/handbook/partv
 next: books/handbook/bibliography
-description: "How to get FreeBSD: CD and DVD sets, FTP sites and how to install and use Git"
-tags: ["Obtaining", "CD", "DVD", "FTP", "Git"]
+description: "How to get FreeBSD: Distribution services, mirrors, code repositories, and SSH keys"
+tags: ["FTP", "Git", "HTTPS", "Mirrors", "Obtaining", "Rsync", "SSH"]
 showBookMenu: true
 weight: 41
 params:
@@ -435,19 +435,3 @@ For more details, including commit messages lists, see the crossref:handbook/ere
 ** RSA key fingerprint is `SHA256:jBe6FQGoH4HjvrIVM23dcnLZk9kmpdezR/CvQzm7rJM`
 
 These are also published as SSHFP records in DNS.
-
-[[mirrors-disc]]
-== Disc Copies
-
-FreeBSD disc copies are available from several online retailers:
-
-* Getlinux +
-Website: https://www.getlinux.fr/
-
-* Dr. Hinner EDV +
-Schäftlarnstr. 10 // 4. Stock +
-D-81371 München +
-Germany +
-Phone: +49 171 417 544 6 +
-Email: infow@hinner.de +
-Website: http://www.hinner.de/linux/freebsd.html