Shorten UI description for private repos

Longer description doesn't wrap in New Repository form and looks ugly.

conf/locale/locale_en-GB.ini

@@ -401,7 +401,7 @@ owner=Owner
 repo_name=Repository Name
 repo_name_helper=Repository names should be short, memorable and unique. It must be one word (no spaces) and can contain letters (a-z), numbers (0-9), dash, (-), underscore (_), or dot (.) characters.
 visibility=Private
-visiblity_helper=Accessible only to owner and assigned collaborators (see Collaboration)
+visiblity_helper=Accessible only to owner and assigned collaborators
 visiblity_helper_forced=Site admin has forced all new repositories to be <span class="ui red text">Private</span>
 visiblity_fork_helper=(Change of this value will affect all forks)
 clone_helper=Need help cloning? Visit <a target="_blank" href="%s">Help</a>!

conf/locale/locale_en-US.ini

@@ -402,7 +402,7 @@ repo_name = Repository Name
 repo_name_helper = Repository names should be short, memorable and unique. It must be one word (no spaces) and can contain letters (a-z), numbers (0-9), dash, (-), underscore (_), or dot (.) characters.
 repo_desc_helper = The title of the dataset or other brief sentence to describe what the repository is about.
 visibility = Private
-visiblity_helper = Accessible only to owner and assigned collaborators (see Collaboration)
+visiblity_helper = Accessible only to owner and assigned collaborators
 visiblity_helper_forced = New repositories are private by default. You can change the state later.
 visiblity_fork_helper = (Change of this value will affect all forks)
 license_warn=Before making this public: Have you added a LICENSE file?