Indexed DB: Remove vendor prefix removal from tests

LayoutTests/storage/indexeddb/transaction-ordering-expected.txt

 Verify Indexed DB transactions are ordered per spec
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB;
-
 dbname = "transaction-ordering.html"
 indexedDB.deleteDatabase(dbname)
 indexedDB.open(dbname)
 
 prepareDatabase():
 db = event.target.result
 store = db.createObjectStore('store')
 
 onOpen():
 db = event.target.result
 
 Create in order tx1, tx2
 tx1 = db.transaction('store', 'readwrite')
 tx2 = db.transaction('store', 'readwrite')
 
 Use in order tx2, tx1
 tx2.objectStore('store').get(0)
 tx1.objectStore('store').get(0)
 
 order = []
 tx1 complete
 tx1 complete
 
 done():
 PASS areArraysEqual(order, [ 1, 2 ]) is true
 PASS successfullyParsed is true
 
 TEST COMPLETE