DeleteEmptyContainer true by default now

bolt.go

@@ -183,6 +183,8 @@ func (r *boltRegistrar) OpenDBWrapper(path0 string, doAllocZero bool, rbfcfg *rb
 		path:        path,
 		doAllocZero: doAllocZero,
 		openTx:      make(map[*BoltTx]bool),
+
+		DeleteEmptyContainer: true,
 	}
 	r.unprotectedRegister(w)
 

lmdb.go

@@ -247,6 +247,8 @@ func (r *lmdbRegistrar) OpenDBWrapper(path0 string, doAllocZero bool, rbfcfg *rb
 		dbi:         dbi,
 		doAllocZero: doAllocZero,
 		openTx:      make(map[*LMDBTx]bool),
+
+		DeleteEmptyContainer: true,
 	}
 	r.unprotectedRegister(w)
 

rbf/db.go

@@ -628,6 +628,8 @@ func (db *DB) begin(writable, exclusive bool) (_ *Tx, err error) {
 		pageMap:     db.pageMap,
 		writable:    writable,
 		exclusive:   exclusive,
+
+		DeleteEmptyContainer: true,
 	}
 	if writable {
 		tx.wcache = db.wcache[:0]