[Clean up] Delete InstantUnitTestBase::SetUpWithoutCacheableNTP().

chrome/browser/search/instant_unittest_base.cc

Index: chrome/browser/search/instant_unittest_base.cc
diff --git a/chrome/browser/search/instant_unittest_base.cc b/chrome/browser/search/instant_unittest_base.cc
index 6c2466ce3f327dbc6e4b369285635c3b45e4eb27..80b43f6b0fa268fc3a31496c4d19f626af8b8e93 100644
--- a/chrome/browser/search/instant_unittest_base.cc
+++ b/chrome/browser/search/instant_unittest_base.cc
@@ -37,12 +37,6 @@ void InstantUnitTestBase::SetUp() {
   SetUpHelper();
 }
 
-void InstantUnitTestBase::SetUpWithoutCacheableNTP() {
-  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
-      "InstantExtended", "Group1 use_cacheable_ntp:0"));
-  SetUpHelper();
-}
-
 void InstantUnitTestBase::SetUpHelper() {
   chrome::EnableQueryExtractionForTesting();
   BrowserWithTestWindowTest::SetUp();