Fix Rubocop offenses

Signed-off-by: Rémy Coutable <remy@rymai.me>

app/controllers/groups/ldap_group_links_controller.rb

@@ -32,9 +32,7 @@ class Groups::LdapGroupLinksController < Groups::ApplicationController
   private
 
   def require_ldap_enabled
-    unless Gitlab.config.ldap.enabled
-      render_404 and return
-    end
+    return render_404 unless Gitlab.config.ldap.enabled
   end
 
   def ldap_group_link_params

lib/gitlab/geo.rb

@@ -50,7 +50,7 @@ module Gitlab
       return false unless Gitlab::Geo.secondary?
 
       self.cache_value(:geo_oauth_application) do
-        Gitlab::Geo.current_node.oauth_application or raise OauthApplicationUndefinedError
+        Gitlab::Geo.current_node.oauth_application || raise OauthApplicationUndefinedError
       end
     end