Remove jslint command line option for arangosh and arangoinspect (#1449)

* Remove documentation of `--jslint` command line option for arangosh/inspector

* Note in appendix that jslint has been removed

* Update 3.12/appendix-deprecated.md

Co-authored-by: Simran <Simran-B@users.noreply.github.com>

* Revert changes to generated files

* Move to release notes

---------

Co-authored-by: Simran <Simran-B@users.noreply.github.com>
Co-authored-by: Simran Spiller <simran@arangodb.com>

Author: markuspf

3.12/release-notes-upgrading-changes312.md

@@ -38,6 +38,13 @@ The second option is the recommended one, as it signals the intent more clearly,
 and makes the cache behave "as expected", i.e. use up to the configured
 memory limit and not just 56% of it.
 
+## Client tools
+
+### jslint feature in arangosh
+
+The `--jslint` startup option and all of the underlying functionality has been
+removed from arangosh. The feature was mainly for internal purposes.
+
 ## HTTP RESTful API
 
 ### JavaScript-based traversal using `/_api/traversal`