Remove inline security warning
This is just an artifact of the wiki migration, a macro added that to wiki pages, now we have plugins.jenkins.io for that.
@@ -7,9 +7,6 @@ Job Configuration History Plugin
Saves copies of all job and system configurations.
-Older versions of this plugin may not be safe to use. Please review the following warnings before using an older version:
-* [Reflected Cross Site Scripting vulnerability](https://jenkins.io/security/advisory/2018-09-25/#SECURITY-1130)
-
This plugin saves **a copy of the configuration file** of jobs and agents (`config.xml`) for every change made and of the system configuration (`<config-name>.xml`).
You can also see what changes have been made by which user if you configured a security policy.
