fs: remove useless comments which duplicate names of variables

PR-URL: #18739
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matheus Marchini <matheus@sthima.com>

lib/fs.js

@@ -375,7 +375,7 @@ function readFileAfterStat(err) {
   // our internal use.
   var size;
   if ((statValues[1/*mode*/] & S_IFMT) === S_IFREG)
-    size = context.size = statValues[8/*size*/];
+    size = context.size = statValues[8];
   else
     size = context.size = 0;
 
@@ -490,7 +490,7 @@ fs.readFileSync = function(path, options) {
   // our internal use.
   var size;
   if ((statValues[1/*mode*/] & S_IFMT) === S_IFREG)
-    size = statValues[8/*size*/];
+    size = statValues[8];
   else
     size = 0;
   var pos = 0;
@@ -1654,8 +1654,8 @@ fs.realpathSync = function realpathSync(p, options) {
       var linkTarget = null;
       var id;
       if (!isWindows) {
-        var dev = statValues[0/*dev*/].toString(32);
-        var ino = statValues[7/*ino*/].toString(32);
+        var dev = statValues[0].toString(32);
+        var ino = statValues[7].toString(32);
         id = `${dev}:${ino}`;
         if (seenLinks[id]) {
           linkTarget = seenLinks[id];
@@ -1793,8 +1793,8 @@ fs.realpath = function realpath(p, options, callback) {
     // dev/ino always return 0 on windows, so skip the check.
     let id;
     if (!isWindows) {
-      var dev = statValues[0/*ino*/].toString(32);
-      var ino = statValues[7/*ino*/].toString(32);
+      var dev = statValues[0].toString(32);
+      var ino = statValues[7].toString(32);
       id = `${dev}:${ino}`;
       if (seenLinks[id]) {
         return gotTarget(null, seenLinks[id], base);