Remove logic for adding a search icon to action bar.

No longer used given that we don't show the search icon on any page.
The main settings page now has the search bar.

Change-Id: I9535028298739467e7fa9c75d1a2fb2b2fa3251b
Fixes: 62230804
Bug: 37477506
Test: robotests

tests/robotests/src/com/android/settings/search/SearchFeatureProviderImplTest.java

@@ -55,18 +55,6 @@ public class SearchFeatureProviderImplTest {
         mProvider = new SearchFeatureProviderImpl();
     }
 
-    @Test
-    public void testPassNull_NoError() {
-        mProvider.setUpSearchMenu(null, null);
-    }
-
-    @Test
-    public void testSetUpMenu_HasItemAdded() {
-        mProvider.setUpSearchMenu(menu, mActivity);
-
-        verify(menu).add(anyInt(), anyInt(), anyInt(), anyString());
-    }
-
     @Test
     public void getSiteMapManager_shouldCacheInstance() {
         final SiteMapManager manager1 = mProvider.getSiteMapManager();