Cleaned up labs flags for GA member filtering features

no issue

- "Last seen" and "Name/Email" filters are now GA without the feature flag in Admin

core/shared/labs.js

@@ -35,9 +35,7 @@ const ALPHA_FEATURES = [
     'beforeAfterCard',
     'tweetGridCard',
     'membersActivityFeed',
-    'improvedOnboarding',
-    'membersLastSeenFilter',
-    'membersContainsFilters'
+    'improvedOnboarding'
 ];
 
 module.exports.GA_KEYS = [...GA_FEATURES];