test,benchmark: fix lint errors on v6.x

PR-URL: #9029
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Myles Borins <[email protected]>

Author: Fishrock123

benchmark/common.js

@@ -262,4 +262,3 @@ exports.v8ForceOptimization = function(method, ...args) {
   method.apply(null, args);
   return eval('%GetOptimizationStatus(method)');
 };
-

benchmark/http/http_server_for_chunky_client.js

@@ -51,4 +51,3 @@ try {
 } catch (e) {
   throw new Error('error: ' + e);
 }
-

benchmark/idle_clients.js

@@ -44,4 +44,3 @@ setInterval(function() {
     console.log('CLIENT %d errors: %d', process.pid, errors);
   }
 }, 1000);
-

test/parallel/test-readline-interface.js

@@ -390,9 +390,9 @@ function isWarned(emitter) {
   assert.equal(readline.codePointAt('ABC', 0), 0x41);
   assert.equal(readline.codePointAt('あいう', 1), 0x3044);
   assert.equal(readline.codePointAt('\ud800\udc00', 0),  // surrogate
-      0x10000);
+               0x10000);
   assert.equal(readline.codePointAt('\ud800\udc00A', 2), // surrogate
-      0x41);
+               0x41);
   assert.equal(readline.getStringWidth('abcde'), 5);
   assert.equal(readline.getStringWidth('古池や'), 6);
   assert.equal(readline.getStringWidth('ノード.js'), 9);