Remove old default search preferences.

components/search_engines/search_engines_pref_names.h

Index: components/search_engines/search_engines_pref_names.h
diff --git a/components/search_engines/search_engines_pref_names.h b/components/search_engines/search_engines_pref_names.h
index 22f7e81bfade36b217211f1bc54a651a4f7b596d..0f07d0158149d7cbf43b3fc139a17f2ba4fafed9 100644
--- a/components/search_engines/search_engines_pref_names.h
+++ b/components/search_engines/search_engines_pref_names.h
@@ -9,23 +9,6 @@ namespace prefs {
 
 extern const char kSyncedDefaultSearchProviderGUID[];
 extern const char kDefaultSearchProviderEnabled[];
-extern const char kDefaultSearchProviderSearchURL[];
-extern const char kDefaultSearchProviderSuggestURL[];
-extern const char kDefaultSearchProviderInstantURL[];
-extern const char kDefaultSearchProviderImageURL[];
-extern const char kDefaultSearchProviderNewTabURL[];
-extern const char kDefaultSearchProviderSearchURLPostParams[];
-extern const char kDefaultSearchProviderSuggestURLPostParams[];
-extern const char kDefaultSearchProviderInstantURLPostParams[];
-extern const char kDefaultSearchProviderImageURLPostParams[];
-extern const char kDefaultSearchProviderIconURL[];
-extern const char kDefaultSearchProviderEncodings[];
-extern const char kDefaultSearchProviderName[];
-extern const char kDefaultSearchProviderKeyword[];
-extern const char kDefaultSearchProviderID[];
-extern const char kDefaultSearchProviderPrepopulateID[];
-extern const char kDefaultSearchProviderAlternateURLs[];
-extern const char kDefaultSearchProviderSearchTermsReplacementKey[];
 extern const char kSearchProviderOverrides[];
 extern const char kSearchProviderOverridesVersion[];
 extern const char kCountryIDAtInstall[];