code: public static void clearRedundantCaches(List<GitHubServerConfig> configs) {
          Path baseCacheDir = getBaseCacheDir();
  
          if (notExists(baseCacheDir)) {
              return;
          }
  
          final Set<String> actualNames = from(configs).filter(withEnabledCache()).transform(toCacheDir())
                  .transform(cacheToName()).toSet();
  
          try (DirectoryStream<Path> caches = newDirectoryStream(baseCacheDir, notInCaches(actualNames))) {
              deleteEveryIn(caches);
          } catch (IOException e) {
              LOGGER.warn("Can't list cache dirs in {}", baseCacheDir, e);
          }
      }
docs: Removes all not active dirs with old caches.
  This method is invoked after each save of global plugin config
  
  @param configs active server configs to exclude caches from cleanup