Remove String version of isSearchResultsPageFromDefaultSearchProvider

Followup to
https://chromium-review.googlesource.com/c/chromium/src/+/2424986/

Bug: 783819
Change-Id: Ic89fc2d6f330c471bfcc18696fafa1f077b901fb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427063
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Commit-Queue: Yaron Friedman <yfriedman@chromium.org>
Auto-Submit: Michael Thiessen <mthiesse@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809902}

components/search_engines/android/java/src/org/chromium/components/search_engines/TemplateUrlService.java

@@ -181,13 +181,6 @@ public class TemplateUrlService {
                 mNativeTemplateUrlServiceAndroid, TemplateUrlService.this);
     }
 
-    /**
-     * Do not use. This is part of a 3-sided patch to avoid breaking downstream builds.
-     */
-    public boolean isSearchResultsPageFromDefaultSearchProvider(String url) {
-        return isSearchResultsPageFromDefaultSearchProvider(new GURL(url));
-    }
-
     /**
      * Checks whether a search result page is from a default search provider.
      * @param url The url for the search result page.