code: function(axisFunctions)
  	{
  		if(axisFunctions && axisFunctions.length > 0)
  		{
  			var len = axisFunctions.length;
  			for(var i = 0; i < len; i++)
  			{
  				if(axisFunctions[i] !== null)
  				{
  					YAHOO.widget.Chart.removeProxyFunction(axisFunctions[i]);
  				}
  			}
  			axisFunctions = [];
  		}
  	}
docs: Removes axis functions contained in an array
  
  @method _removeAxisFunctions
  @private