removed obsolete code

lib/single-file/doc-helper.js

@@ -190,7 +190,6 @@ this.docHelper = this.docHelper || (() => {
 					} else {
 						imageElement.style.removeProperty("padding");
 					}
-					imageElement.style.removeProperty("padding");
 					imageData = {
 						width: imageElement.width,
 						height: imageElement.height,