Remove the deprecated function ExtensionService::extensions().

chrome/browser/extensions/updater/extension_updater_unittest.cc

Index: chrome/browser/extensions/updater/extension_updater_unittest.cc
diff --git a/chrome/browser/extensions/updater/extension_updater_unittest.cc b/chrome/browser/extensions/updater/extension_updater_unittest.cc
index 0d9b6d4783720ffd9b1f0ef684ddde3ea5f613b0..e50c426458f865247abb87a0bbe1ba952206fda3 100644
--- a/chrome/browser/extensions/updater/extension_updater_unittest.cc
+++ b/chrome/browser/extensions/updater/extension_updater_unittest.cc
@@ -457,10 +457,6 @@ class ServiceForManifestTests : public MockService {
     return registry_->disabled_extensions().GetByID(id);
   }
 
-  const ExtensionSet* extensions() const override {
-    return &registry_->enabled_extensions();
-  }
-
   PendingExtensionManager* pending_extension_manager() override {
     return &pending_extension_manager_;
   }