remove message from test assertion

assert message in strictEqual was hiding error why test has failed, it
just showed what value is expected and in case of failure we want to
know which value has caused test to fail

test/parallel/test-child-process-spawnsync.js

@@ -28,7 +28,7 @@ const spawnSync = require('child_process').spawnSync;
 // Echo does different things on Windows and Unix, but in both cases, it does
 // more-or-less nothing if there are no parameters
 const ret = spawnSync('sleep', ['0']);
-assert.strictEqual(ret.status, 0, 'exit status should be zero');
+assert.strictEqual(ret.status, 0);
 
 // Error test when command does not exist
 const ret_err = spawnSync('command_does_not_exist', ['bar']).error;