Remove redundant user tag filter

php/utils/servers-rooms.php

@@ -110,7 +110,6 @@
 		function jsonSerialize(): array {
 			$details = get_object_vars($this);
 			unset($details['server']);
-			$details['tags'] = CommunityTag::cacheable_room_tags($details['tags']);
 			return $details;
 		}
 

php/utils/tags.php

@@ -42,19 +42,6 @@
             return $details;
         }
 
-        /**
-         * @param \CommunityTag[] $tags
-         * @return string[]
-         */
-        public static function cacheable_room_tags(array $tags) {
-            return array_map(
-                function (\CommunityTag $tag) { return $tag->__toString(); },
-                array_filter($tags, function(\CommunityTag $tag) {
-                    return $tag->type == TagType::USER_TAG;
-                })
-            );
-        }
-
         private static function preprocess_tag(?string $tag) {
             $tag = trim($tag);