fs: simplify realpathSync

PR-URL: #35413
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/fs.js

@@ -1566,10 +1566,7 @@ if (isWindows) {
 
 const emptyObj = ObjectCreate(null);
 function realpathSync(p, options) {
-  if (!options)
-    options = emptyObj;
-  else
-    options = getOptions(options, emptyObj);
+  options = getOptions(options, emptyObj);
   p = toPathIfFileURL(p);
   if (typeof p !== 'string') {
     p += '';
@@ -1601,7 +1598,7 @@ function realpathSync(p, options) {
   pos = current.length;
 
   // On windows, check that the root exists. On unix there is no need.
-  if (isWindows && !knownHard[base]) {
+  if (isWindows) {
     const ctx = { path: base };
     binding.lstat(pathModule.toNamespacedPath(base), false, undefined, ctx);
     handleErrorFromBinding(ctx);
@@ -1799,7 +1796,7 @@ function realpath(p, options, callback) {
       const ino = stats.ino.toString(32);
       id = `${dev}:${ino}`;
       if (seenLinks[id]) {
-        return gotTarget(null, seenLinks[id], base);
+        return gotTarget(null, seenLinks[id]);
       }
     }
     fs.stat(base, (err) => {
@@ -1812,7 +1809,7 @@ function realpath(p, options, callback) {
     });
   }
 
-  function gotTarget(err, target, base) {
+  function gotTarget(err, target) {
     if (err) return callback(err);
 
     gotResolvedLink(pathModule.resolve(previous, target));