refactor(timeline): Don't request redecryptions in the timeline

crates/matrix-sdk-ui/src/timeline/controller/decryption_retry_task.rs

@@ -92,10 +92,10 @@ async fn redecryption_report_task(timeline_controller: TimelineController) {
                 }
             }
             Ok(RedecryptorReport::Lagging | RedecryptorReport::BackupAvailable) | Err(_) => {
-                // The room key stream lagged, the OlmMachine got regenerated or we got access
-                // to a backup. Let's tell the redecryptor to attempt
-                // redecryption of our timeline items.
-                timeline_controller.retry_event_decryption(None).await;
+                // Since the event cache keeps all the events we are keeping
+                // cached in the timeline in memory as well,
+                // R2D2 will handle the redecryption of these events when any of
+                // those reports come in.
             }
         }
     }