clear by cutoff only when not targeting wasm

crates/re_data_store/src/log_db.rs

@@ -280,6 +280,7 @@ impl LogDb {
     }
 
     /// Free up some RAM by forgetting parts of the time that are more than `cutoff` ns in the past.
+    #[cfg(not(target_arch = "wasm32"))]
     pub fn clear_by_cutoff(&mut self, cutoff: i64) {
         let cutoff_time = Time::now().nanos_since_epoch() - cutoff;
         let oldest = self.entity_db.data_store.oldest_time_per_timeline();

crates/re_viewer/src/app.rs

@@ -849,6 +849,7 @@ impl App {
             }
         }
 
+        #[cfg(not(target_arch = "wasm32"))]
         for log_db in self.log_dbs.values_mut() {
             log_db.clear_by_cutoff(2e9 as i64);
         }