path: remove unnecessary if statement

There is an `if`-statement in `normalizeString` (a helper function for
`path.normalize`) whose `else`-branch is never taken. This patch
removes it.
PR-URL: #22273
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: wchargin

lib/path.js

@@ -77,18 +77,16 @@ function normalizeString(path, allowAboveRoot, separator, isPathSeparator) {
 res.charCodeAt(res.length-2)!==CHAR_DOT){
 if(res.length>2){
 constlastSlashIndex=res.lastIndexOf(separator);
-if(lastSlashIndex!==res.length-1){
-if(lastSlashIndex===-1){
-res='';
-lastSegmentLength=0;
-}else{
-res=res.slice(0,lastSlashIndex);
-lastSegmentLength=res.length-1-res.lastIndexOf(separator);
-}
-lastSlash=i;
-dots=0;
-continue;
+if(lastSlashIndex===-1){
+res='';
+lastSegmentLength=0;
+}else{
+res=res.slice(0,lastSlashIndex);
+lastSegmentLength=res.length-1-res.lastIndexOf(separator);
 }
+lastSlash=i;
+dots=0;
+continue;
 }elseif(res.length===2||res.length===1){
 res='';
 lastSegmentLength=0;