vulkan/dispatch_table: EntrypointBase doesn't need to derive from object

We use python3 now and everything derives from object automatically

Suggested-by: Dylan Baker <dylan@pnwbakers.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13156>

src/vulkan/util/vk_dispatch_table_gen.py

@@ -743,7 +743,7 @@ class StringIntMap(object):
 
 EntrypointParam = namedtuple('EntrypointParam', 'type name decl len')
 
-class EntrypointBase(object):
+class EntrypointBase:
     def __init__(self, name):
         assert name.startswith('vk')
         self.name = name[2:]