title: Delete characters in range of string
body: <p>I have the following string I would like to edit:</p>
  
  <pre><code>var someString = "I wan't this text {something I don't want}"
  </code></pre>
  
  <p>I would like to remove all the text contained in the two braces, no matter how long that text is. I have been using the follow code to remove a section of a String when I know the range: </p>
  
  <pre><code>extension String {
      mutating func deleteCharactersInRange(range: NSRange) {
          let mutableSelf = NSMutableString(string: self)
          mutableSelf.deleteCharactersInRange(range)
          self = mutableSelf
      }
  }
  </code></pre>
  
  <p>However, I do not know the range in my problem. Any ideas?</p>