review(#1194): removing test, unless blank instead of nil

Author: kennethrioja

config/initializers/session_store.rb

@@ -4,7 +4,7 @@
 if Rails.env.production?
   opts = { same_site: :lax, secure: true }
   expiry_time = TeSS::Config.login_expires_after
-  opts[:expire_after] = expiry_time unless expiry_time.nil?
+  opts[:expire_after] = expiry_time unless expiry_time.blank?
 end
 
 Rails.application.config.session_store :cookie_store, **opts