Remove search indexing pipeline from Settings

Index is already handled by SettingsIntelligenec. No longer needed in
Settings.

Change-Id: Id43fb3100dc2759185744441cff8cb9cd2d2da20
Fixes: 69808376
Test: robotests

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

@@ -86,12 +86,4 @@ public class SearchFeatureProviderImplTest {
         final ComponentName cn = new ComponentName(packageName, "class");
         mProvider.verifyLaunchSearchResultPageCaller(mActivity, cn);
     }
-
-    @Test
-    public void cleanQuery_trimsWhitespace() {
-        final String query = "  space ";
-        final String cleanQuery = "space";
-
-        assertThat(mProvider.cleanQuery(query)).isEqualTo(cleanQuery);
-    }
 }