diff --git a/ts.py b/ts.py
deleted file mode 100644
index c368cc6..0000000
--- a/ts.py
+++ /dev/null
@@ -1,28 +0,0 @@
-import sys
-
-def main(filename):
-    if not filename.endswith(".bak"):
-        raise "need a backup file"
-    print(filename)
-    s = ""
-    with open(filename) as f:
-        end = False
-        for line in f:
-            if line.startswith("## "):
-                if end:
-                    s += "\n</div>\n</details>\n\n"
-                    end = False
-                s += line
-                print(line.replace("##", "-"), end="")
-                s += "\n<details>\n<summary>答案</summary>\n<div>\n"
-                end = True
-            else:
-                s += line
-        s += "\n</div>\n</details>\n\n"
-    
-
-    with open(filename.strip(".bak"), "w") as f:
-        f.write(s)
-
-
-main(sys.argv[1])
\ No newline at end of file