code: function removeContext(contextToRemove) {
    if (contextToRemove && contextToRemove.length) {
      _previousContext = _context
      _removeItems(_context, contextToRemove)
      if (_isEmpty(context)) {
        _context = _defaultContext
      }
    }
    return _context
  }
docs: Removes the given context
  @param {string|Array.<string>} contextToRemove The context to remove
  @returns {Array.<string>} Genie's new context
  @public