import-checker: suppress check-code about any()

ast is a new enough module that this script can't work on any version
of Python without any(), so we'll just use it.

contrib/import-checker.py

@@ -71,9 +71,11 b' def list_stdlib_modules():'
         else:
             stdlib_prefixes.add(dirname)
     for libpath in sys.path:
-        # We want to walk everything in sys.path that starts with something
-        # in stdlib_prefixes.
-        if not any(libpath.startswith(p) for p in stdlib_prefixes):
+        # We want to walk everything in sys.path that starts with
+        # something in stdlib_prefixes. check-code suppressed because
+        # the ast module used by this script implies the availability
+        # of any().
+        if not any(libpath.startswith(p) for p in stdlib_prefixes): # no-check-code
             continue
         if 'site-packages' in libpath:
             continue