code: public function rmdir($path, $options)
      {
          if ($this->getContainerName($path) == $this->getFileName($path)) {
              // Clear the stat cache so that affected paths are refreshed.
              clearstatcache();
  
              // Delete container
              try {
                  $this->getStorageClient($path)->deleteContainer(
                      $this->getContainerName($path)
                  );
                  return true;
              } catch (BlobException $ex) {
                  return false;
              }
          } else {
              throw new BlobException('rmdir() with multiple levels is not supported on Windows Azure Blob Storage.');
          }
      }
docs: Remove a directory
  
  @param  string  $path
  @param  integer $options
  @return boolean