[modular] Disable flaky test ledger_story_model_storage_unittest

TEST=none
FLK-30 #done

Change-Id: I861a0252575d9b31d320fa9a0a701cf454485dd0
diff --git a/bin/sessionmgr/story/model/BUILD.gn b/bin/sessionmgr/story/model/BUILD.gn
index db4f5b1..23a845f 100644
--- a/bin/sessionmgr/story/model/BUILD.gn
+++ b/bin/sessionmgr/story/model/BUILD.gn
@@ -17,7 +17,7 @@
   deps = [
     ":apply_mutations_unittest",
     ":story_model_owner_unittest",
-    ":ledger_story_model_storage_unittest",
+    # DISALBED: FLAKY ":ledger_story_model_storage_unittest",
   ]
 }