leveldb: drop compaction unit test

Signed-off-by: Samuel Just <rexludorum@gmail.com>

diff --git a/src/leveldb b/src/leveldb
index 08c39ee222de6c07f94724bcd61d33573e2f873a..8b5ada5c89c0fc34b3c277337d9b3f2c6f1fb85d 160000 (submodule)
--- a/src/leveldb
+++ b/src/leveldb
@@ -1 +1 @@
-Subproject commit 08c39ee222de6c07f94724bcd61d33573e2f873a
+Subproject commit 8b5ada5c89c0fc34b3c277337d9b3f2c6f1fb85d