Bug 35348: Ensure users can access cookie details in staff client

Bug 35348: Ensure users can access cookie details in staff client

We remove the check on JSConsents content so that when cookie consent is
enabled we retain the option for users to get more information about
what cookies are being used.

Test plan
1) Enable CookieConsents
2) Do not add any tracking cookies for the staff client into
   CookieConsentedJS preference
3) Note that 'My consents' appears in the user menu
4) Clicking 'My consents' opens the 'Cookie consent' modal displaying
   information about the cookies used.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>