remove duplicate isinstance check

diff --git a/dns/rdtypes/util.py b/dns/rdtypes/util.py
index 03afb32e6b80a309567ce732a546ace2290e9a30..aed67d76340f8279ea0afc5e1d7726b6fd3b9227 100644 (file)
--- a/dns/rdtypes/util.py
+++ b/dns/rdtypes/util.py
@@ -102,8 +102,6 @@ class Bitmap:
         last_window = -1
         self.windows = windows
         for (window, bitmap) in self.windows:
-            if not isinstance(window, int):
-                raise ValueError(f"bad {self.type_name} window type")
             if not isinstance(window, int):
                 raise ValueError(f"bad {self.type_name} window type")
             if window <= last_window: