title: How to unbind a key binding in Sublime Text 2?
body: <p>I have a habit of hitting <kbd>CTRL</kbd>+<kbd>T</kbd> to open a new tab in ST2. However this invokes the transpose function. I could map the <code>new_file</code> command to <kbd>CTRL</kbd>+<kbd>T</kbd>, but is it possible to disable the command completely via user keymap file. My search suggested adding this to user keymap. </p>
  
  <pre><code>[ { "keys": ["ctrl+t"], "command": "unbound" } ]
  </code></pre>
  
  <p>Is the "unbound" an officially endorsed way of disabling a shortcut? </p>