removed pointless code

lib/single-file/single-file-browser.js

@@ -83,7 +83,7 @@ this.SingleFile = (() => {
 				getComputedStyle,
 				document: doc,
 				serialize: () => getDoctype(doc) + doc.documentElement.outerHTML,
-				parseSrcSet: srcSet => parseSrcset(srcSet)
+				parseSrcset,
 			};
 		}
 	}