title: remove some initial bytes from a bytearray in flex
body: <p>I read a file's content into a byte array using the following code:</p>
  
  <pre><code>  public var bytes:ByteArray = new ByteArray();
    var primaryfile:File = File.applicationStorageDirectory.resolvePath("data/updates/assets/"+this.assetvideoid+"/"+this.assetdetails[0]['filename']);
    var tempfile:File = File.applicationStorageDirectory.resolvePath("data/updates/assets/"+this.assetvideoid+"/"+this.assetdetails[0]['filename']+"-temp");
    filestream = new FileStream();
    filestream.open(primaryfile, FileMode.READ);
    filestream.readBytes(bytes, 0, bytes.length);
    filestream.close();
  </code></pre>
  
  <p>Is it possible to remove some initial bytes from a bytearray say 30 bytes from the beginning?</p>