test: fix flaky test-repl

PR-URL: #5914
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

test/parallel/test-repl.js

@@ -15,7 +15,7 @@ const prompt_npm = 'npm should be run outside of the ' +
                    'node repl, in your normal shell.\n' +
                    '(Press Control-D to exit.)\n';
 const expect_npm = prompt_npm + prompt_unix;
-var server_tcp, server_unix, client_tcp, client_unix, timer, replServer;
+var server_tcp, server_unix, client_tcp, client_unix, replServer;
 
 
 // absolute path to test/fixtures/a.js
@@ -45,7 +45,6 @@ function send_expect(list) {
 function clean_up() {
   client_tcp.end();
   client_unix.end();
-  clearTimeout(timer);
 }
 
 function strict_mode_error_test() {
@@ -463,7 +462,3 @@ function unix_test() {
 }
 
 unix_test();
-
-timer = setTimeout(function() {
-  assert.fail(null, null, 'Timeout');
-}, 5000);