SERVER-6448: enable nestedobj1.js

Author: Ben Becker

jstests/nestedobj1.js

@@ -1,7 +1,5 @@
 //SERVER-5127, SERVER-5036
 
-if ( typeof _threadInject == "undefined" ) { // SERVER-6448
-
 function makeNestObj(depth){
     toret = { a : 1};
 
@@ -28,4 +26,3 @@ assert.eq(1, t.find({tst : "test2"}).count(), "find test");
 //make sure index insertion failed (nesting must be large enough)
 assert.eq(0, t.find().hint({a:1}).explain().n, "index not empty");
 print("Test succeeded!")
-}