consult_bycat: deduplicate

Weasel word: growing. (Not always; lists sometimes shrink.)

What was (or is) stated at the parent page – note, the sidebar and menu contexts for https://www.freebsd.org/commercial/ – need not be restated, verbatim or condensed, in pages such as these. 

Aiming to have the same text at eight or more subpages is not only a maintenance burden, there's also resultant nonsense.

website/content/en/commercial/consult_bycat.adoc

@@ -6,11 +6,3 @@ grouped: true
 ---
 
 = Consulting Services
-
-The power, flexibility, and reliability of FreeBSD attract a wide variety of users and vendors.
-Here you will find vendors offering commercial products and/or services for FreeBSD.
-
-For your convenience, we have divided our growing commercial listing into several sections.
-If your company supports a FreeBSD related product, service, consulting, or support that should be added to this page, please fill out a https://www.freebsd.org/support/bugreports/[problem report] in category Documentation->Website.
-Submissions should contain a medium-sized paragraph in length, describing your company.
-Please note that the inclusion of vendors in our list does not signify our endorsement of their products or services by the FreeBSD Project.