fix: Drop duplicated received filter update

This fixes an issue introduced in #211 where the `receiver_filter_heights` lock isn't released after inserting the received height, and then the same task tries to acquire the lock again just a bit below in `mark_filter_received` -> deadlock.

So, #211 should have not introduced the filter height updates here since they already exist in `mark_filter_received`. Yet the stats updates introduced in the same place are legit.

Author: xdustinface

dash-spv/src/sync/message_handlers.rs

@@ -629,14 +629,6 @@ impl<
             stats_lock.last_filter_received_time = Some(std::time::Instant::now());
         }
 
-        // Get the shared filter heights arc from stats
-        let stats_lock = self.stats.read().await;
-        let received_filter_heights = stats_lock.received_filter_heights.clone();
-        drop(stats_lock); // Release the stats lock before acquiring the mutex
-
-        // Now lock the heights and insert
-        let mut heights = received_filter_heights.lock().await;
-        heights.insert(height);
         tracing::trace!(
             "📊 Recorded filter received at height {} for block {}",
             height,