benchmark: remove unused variables

Remove variables that are assigned but never used.

(This was missed by the linter in previous versions of ESLint but is
flagged by the current version. Updating the linter is contingent on
this change or some similar remedy landing.)

PR-URL: https://github.com/nodejs/node/pull/7600
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

benchmark/http/_chunky_http_client.js

@@ -50,8 +50,6 @@ function main(conf) {
     }
   }
 
-  var success = 0;
-  var failure = 0;
   var min = 10;
   var size = 0;
   var mod = 317;
@@ -69,14 +67,12 @@ function main(conf) {
       if ((d.length === pattern.length && d === pattern) ||
           (d.length > pattern.length &&
            d.slice(0, pattern.length) === pattern)) {
-        success += 1;
         did = true;
       } else {
         pattern = 'HTTP/1.1 ';
         if ((d.length === pattern.length && d === pattern) ||
             (d.length > pattern.length &&
              d.slice(0, pattern.length) === pattern)) {
-          failure += 1;
           did = true;
         }
       }

benchmark/static_http_server.js

@@ -6,7 +6,6 @@ var port = 12346;
 var n = 700;
 var bytes = 1024 * 5;
 
-var requests = 0;
 var responses = 0;
 
 var body = 'C'.repeat(bytes);
@@ -37,6 +36,5 @@ server.listen(port, function() {
       });
     });
     req.id = i;
-    requests++;
   }
 });

test/parallel/test-event-emitter-remove-listeners.js

@@ -3,16 +3,12 @@ var common = require('../common');
 var assert = require('assert');
 var events = require('events');
 
-var count = 0;
-
 function listener1() {
   console.log('listener1');
-  count++;
 }
 
 function listener2() {
   console.log('listener2');
-  count++;
 }
 
 function remove1() {

test/parallel/test-tls-session-cache.js

@@ -89,11 +89,7 @@ function doTest(testOptions, callback) {
     var client = spawn(common.opensslCli, args, {
       stdio: [ 0, 1, 'pipe' ]
     });
-    var err = '';
     client.stderr.setEncoding('utf8');
-    client.stderr.on('data', function(chunk) {
-      err += chunk;
-    });
     client.on('exit', function(code) {
       console.error('done');
       assert.equal(code, 0);

test/sequential/test-pump-file2tcp-noexist.js

@@ -26,9 +26,6 @@ var server = net.createServer(function(stream) {
 server.listen(common.PORT, function() {
   var conn = net.createConnection(common.PORT);
   conn.setEncoding('utf8');
-  conn.on('data', function(chunk) {
-    buffer += chunk;
-  });
 
   conn.on('end', function() {
     conn.end();
@@ -39,8 +36,6 @@ server.listen(common.PORT, function() {
   });
 });
 
-var buffer = '';
-
 process.on('exit', function() {
   assert.equal(true, got_error);
   assert.equal(true, conn_closed);