Remove useless use of pref from unit test.

chrome/browser/browsing_data_remover_unittest.cc

Index: chrome/browser/browsing_data_remover_unittest.cc
diff --git a/chrome/browser/browsing_data_remover_unittest.cc b/chrome/browser/browsing_data_remover_unittest.cc
index c29497778ac39432e2b21eab07faf7bd4754ef19..97353ce85d53c3fa31ac525a040bad26ff66aff9 100644
--- a/chrome/browser/browsing_data_remover_unittest.cc
+++ b/chrome/browser/browsing_data_remover_unittest.cc
@@ -243,7 +243,6 @@ class BrowsingDataRemoverTest : public testing::Test {
         file_thread_(BrowserThread::FILE, &message_loop_),
         io_thread_(BrowserThread::IO, &message_loop_),
         profile_(new TestingProfile()) {
-    profile_->GetPrefs()->SetBoolean(prefs::kClearPluginLSODataEnabled, false);
   }
 
   virtual ~BrowsingDataRemoverTest() {