repl: remove unnecessary check for globals

There is no need to check for globals and also check if it is
an array.

PR-URL: https://github.com/nodejs/io.js/pull/1722
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/repl.js

@@ -624,7 +624,7 @@ REPLServer.prototype.complete = function(line, callback) {
           completionGroupsLoaded();
         } else {
           this.eval('.scope', this.context, 'repl', function(err, globals) {
-            if (err || !globals || !Array.isArray(globals)) {
+            if (err || !Array.isArray(globals)) {
               addStandardGlobals(completionGroups, filter);
             } else if (Array.isArray(globals[0])) {
               // Add grouped globals