Remove unreferenced message 'StreamCursor'

PiperOrigin-RevId: 268234318
Change-Id: I34a675a5ef76c27ab4a264eef179f773f2f2a6ab
diff --git a/src/main/proto/com/google/android/libraries/feed/api/internal/proto/stream_data.proto b/src/main/proto/com/google/android/libraries/feed/api/internal/proto/stream_data.proto
index bc03bdd..a800459 100644
--- a/src/main/proto/com/google/android/libraries/feed/api/internal/proto/stream_data.proto
+++ b/src/main/proto/com/google/android/libraries/feed/api/internal/proto/stream_data.proto
@@ -184,15 +184,6 @@
   optional bytes data = 2;
 }
 
-// This message allows a Cursor to be serialized.
-message StreamCursor {
-  // The Parent of the cursor.
-  optional string parent_content_id = 1;
-
-  // This is the ContentId of the last accessed Child in the cursor.
-  optional string last_accessed_content = 2;
-}
-
 // List of all the sessions.
 message StreamSessions {
   // Represents the current sessions