Indexed DB: Remove vendor prefix removal from tests

LayoutTests/storage/indexeddb/resources/intversion-encoding.js

 if (this.importScripts) {
     importScripts('../../../resources/js-test.js');
     importScripts('shared.js');
 }
 
 description("Test that integer versions are encoded/decoded consistently.");
 
 versions = [1,
             0x7f,
             0x80,
             0x80000000,
             9007199254740991]; // 2^53-1, maximum JavaScript integer.
 
 function test()
 {
-    removeVendorPrefixes();
     setDBNameFromPath();
     request = evalAndLog("indexedDB.deleteDatabase(dbname)");
     request.onblocked = unexpectedBlockedCallback;
     request.onerror = unexpectedErrorCallback;
     request.onsuccess = openFirstTime;
 }
 
 function openFirstTime(evt) {
     preamble(evt);
 
@@ skipping 29 matching lines @@
     request.onupgradeneeded = unexpectedUpgradeNeededCallback;
     request.onsuccess = function() {
         evalAndLog("db = request.result");
         shouldBe("db.version", "version");
         evalAndLog("db.close()");
         openFirstTime();
     };
 }
 
 test();