diff --git a/probe_q.py b/probe_q.py
deleted file mode 100644
index c23f300..0000000
--- a/probe_q.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import sys, importlib.util
-sys.stdout.reconfigure(encoding="utf-8")
-from musicdl.modules.sources.qq import QQMusicClient
-from musicdl.modules.sources.netease import NeteaseMusicClient
-from musicdl.modules.sources.kugou import KugouMusicClient
-from musicdl.modules.utils.qqutils import SongFileType
-# find MUSIC_QUALITIES in source modules
-for mod in (QQMusicClient, NeteaseMusicClient, KugouMusicClient):
-    src = mod.__module__
-    m = getattr(mod, 'source', '?')
-    names = [x for x in mod.__init__.__globals__.keys() if 'QUALIT' in x.upper()]
-    print("SRC", m, "quality-names-in-globals:", names)
-    for n in names:
-        v = mod.__init__.__globals__[n]
-        print("   ", n, "=", v)
-print("QQ SORTED_QUALITIES:", SongFileType.SORTED_QUALITIES.value)
\ No newline at end of file