benchmark,path: remove unused variables

PR-URL: #15789
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: 薛定谔的猫

benchmark/fs/read-stream-throughput.js

@@ -33,7 +33,7 @@ function main(conf) {
       throw new Error('invalid type');
   }
 
-  makeFile(runTest);
+  makeFile();
 }
 
 function runTest() {

lib/path.js

@@ -269,7 +269,6 @@ const win32 = {
                    (code >= 97/*a*/ && code <= 122/*z*/)) {
           // Possible device root
 
-          code = path.charCodeAt(1);
           if (path.charCodeAt(1) === 58/*:*/) {
             device = path.slice(0, 2);
             rootEnd = 2;
@@ -391,7 +390,6 @@ const win32 = {
                  (code >= 97/*a*/ && code <= 122/*z*/)) {
         // Possible device root
 
-        code = path.charCodeAt(1);
         if (path.charCodeAt(1) === 58/*:*/) {
           device = path.slice(0, 2);
           rootEnd = 2;
@@ -769,7 +767,6 @@ const win32 = {
                  (code >= 97/*a*/ && code <= 122/*z*/)) {
         // Possible device root
 
-        code = path.charCodeAt(1);
         if (path.charCodeAt(1) === 58/*:*/) {
           rootEnd = offset = 2;
           if (len > 2) {
@@ -1037,7 +1034,6 @@ const win32 = {
                  (code >= 97/*a*/ && code <= 122/*z*/)) {
         // Possible device root
 
-        code = path.charCodeAt(1);
         if (path.charCodeAt(1) === 58/*:*/) {
           rootEnd = 2;
           if (len > 2) {