code: void removeCache(Path hdfsPath) {
      CacheEntry c = cacheMap.remove(hdfsPath);
      if (c != null) {
        cacheSize.addAndGet(-c.entrySize);
        localMetrics.numRemove++;
        if (LOG.isDebugEnabled()) {
          LOG.debug("LookasideCache removed path:" + hdfsPath +
                    " freed up size: " + c.entrySize);
        }
      }
    }
docs: Delete an entry from the cache.