remove duplicate filter types

only use nostrdb::Filter

Signed-off-by: William Casarin <jb55@jb55.com>

queries/hashtags.json

@@ -1,4 +1,4 @@
-[{"limit": 1000,
+{"limit": 1000,
   "kinds": [
     1
   ],
@@ -39,4 +39,4 @@
     "womeninnostr",
     "osrs"
   ]
-}]
+}

queries/notifications.json

@@ -1 +1 @@
-[{"limit": 500, "kinds":[1], "#p": ["32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245"]}]
+{"limit": 500, "kinds":[1], "#p": ["32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245"]}