bug: supress deprecation warning when importing cgi module

cgi was removed in 3.13, but it is vendored in Roundup.
So we don't need to see the warning.

Author: rouilj

roundup/anypy/cgi_.py

@@ -1,7 +1,10 @@
 # ruff: noqa: F401  - unused imports
+import warnings
 try:
     # used for python2 and python 3 < 3.13
-    import cgi
+    with warnings.catch_warnings():
+        warnings.filterwarnings('ignore', category=DeprecationWarning)
+        import cgi
     from cgi import FieldStorage, MiniFieldStorage
 except ImportError:
     # use for python3 >= 3.13