[Sync] Deprecate sync session page state field

components/sessions/core/serialized_navigation_entry.cc

Index: components/sessions/core/serialized_navigation_entry.cc
diff --git a/components/sessions/core/serialized_navigation_entry.cc b/components/sessions/core/serialized_navigation_entry.cc
index c44aeb355901ed475bee1570a8eae30c57b67b09..746de644b20b5c6f91494dc922e193710879370f 100644
--- a/components/sessions/core/serialized_navigation_entry.cc
+++ b/components/sessions/core/serialized_navigation_entry.cc
@@ -36,7 +36,6 @@ SerializedNavigationEntry SerializedNavigationEntry::FromSyncData(
   SerializedNavigationEntry navigation;
   navigation.index_ = index;
   navigation.unique_id_ = sync_data.unique_id();
-  navigation.encoded_page_state_ = sync_data.state();
   if (sync_data.has_correct_referrer_policy()) {
     navigation.referrer_url_ = GURL(sync_data.referrer());
     navigation.referrer_policy_ = sync_data.correct_referrer_policy();
@@ -49,9 +48,6 @@ SerializedNavigationEntry SerializedNavigationEntry::FromSyncData(
       navigation.referrer_url_ = GURL();
     }
     navigation.referrer_policy_ = mapped_referrer_policy;
-    navigation.encoded_page_state_ =
-        SerializedNavigationDriver::Get()->StripReferrerFromPageState(
-            navigation.encoded_page_state_);
   }
   navigation.virtual_url_ = GURL(sync_data.virtual_url());
   navigation.title_ = base::UTF8ToUTF16(sync_data.title());