function _removeUrlIfUndefined(oAsyncHint, sUrl) {
			if (sUrl === undefined) {
				delete oAsyncHint.url;
			}
		}
The helper function rewrites URLs of an asyncHints object using a
callback function with specific string manipulations, especially
for 'sap.ui.core.Component.create' and 'sap.ui.core.Component.load'.
Only URLs of defined components and libs are affected.

@param {object} oAsyncHints An object that provides hints for asynchronous loading (@see sap.ui.core.Component#load)
@param {function} fnUrlModifier A callback function that gets a URL string passed and returns its manipulated value
@return {object} The manipulated asyncHints object

@private
@ui5-restricted sap.ushell