diff --git a/tsdb/engine/bz1/bz1.go b/tsdb/engine/bz1/bz1.go
index <HASH>..<HASH> 100644
--- a/tsdb/engine/bz1/bz1.go
+++ b/tsdb/engine/bz1/bz1.go
@@ -598,7 +598,6 @@ func (tx *Tx) Cursor(key string) tsdb.Cursor {
 
 	c := &Cursor{
 		cursor: b.Cursor(),
-		buf:    make([]byte, DefaultBlockSize),
 	}
 
 	return tsdb.MultiCursor(walCursor, c)
Remove unused buffer allocation

The buffer allocation in bz1 was unused and I'm fairly certain that it
was harmful to performance if used. For queries that run through a bz1
block, needing to hold on to a <I>kb block is expensive. Better to churn
on the allocator and have the blocks be released when they are unused
than to have <I>kb hanging around for each series regardless of size.