Drop default job template categories (#4411)

The list is very outdated by now.

Author: aneta-petrova

guides/common/assembly_job-template-examples-and-extensions.adoc

@@ -4,8 +4,6 @@ include::modules/con_job-template-examples-and-extensions.adoc[]
 
 include::modules/ref_customizing-job-templates.adoc[leveloffset=+1]
 
-include::modules/ref_default-job-template-categories.adoc[leveloffset=+1]
-
 include::modules/ref_example-restorecon-template.adoc[leveloffset=+1]
 
 include::modules/ref_rendering-a-restorecon-template.adoc[leveloffset=+1]

guides/common/modules/proc_creating-a-job-template-by-using-web-ui.adoc

@@ -13,7 +13,7 @@ Use this procedure to create a job template from the {ProjectWebUI}.
 . Select *Default* to make the template available for all organizations and locations.
 . Create the template directly in the template editor or upload it from a text file by clicking *Import*.
 . Optional: In the *Audit Comment* field, add information about the change.
-. Click the *Job* tab, and in the *Job category* field, enter your own category or select from the default categories listed in xref:default-job-template-categories_{context}[].
+. Click the *Job* tab, and in the *Job category* field, enter your own category or select from the default categories.
 . Optional: In the *Description Format* field, enter a description template.
 For example, `Install package %\{package_name}`.
 You can also use `%\{template_name}` and `%\{job_category}` in your template.