Core: Revert apache#12670 to Temporarily Restore Sending Single Snapshot Changes Rather than in Bulk (apache#13100)

Author: aihuaxu

core/src/main/java/org/apache/iceberg/TableMetadata.java

@@ -1432,14 +1432,12 @@ public Builder removeSnapshots(Collection<Long> idsToRemove) {
     private Builder rewriteSnapshotsInternal(Collection<Long> idsToRemove, boolean suppress) {
       List<Snapshot> retainedSnapshots =
           Lists.newArrayListWithExpectedSize(snapshots.size() - idsToRemove.size());
-      Set<Long> snapshotIdsToRemove = Sets.newHashSet();
-
       for (Snapshot snapshot : snapshots) {
         long snapshotId = snapshot.snapshotId();
         if (idsToRemove.contains(snapshotId)) {
           snapshotsById.remove(snapshotId);
           if (!suppress) {
-            snapshotIdsToRemove.add(snapshotId);
+            changes.add(new MetadataUpdate.RemoveSnapshot(snapshotId));
           }
           removeStatistics(snapshotId);
           removePartitionStatistics(snapshotId);
@@ -1448,10 +1446,6 @@ private Builder rewriteSnapshotsInternal(Collection<Long> idsToRemove, boolean s
         }
       }
 
-      if (!snapshotIdsToRemove.isEmpty()) {
-        changes.add(new MetadataUpdate.RemoveSnapshots(snapshotIdsToRemove));
-      }
-
       this.snapshots = retainedSnapshots;
 
       // remove any refs that are no longer valid