security policy docs and legacy policy improvements

- Added `set_security_policy`` to more places in the docs.
- Ensure that the authn/authz policies are not used at all if the legacy
  policy is not in effect to avoid edge cases where the code would skip
  the security policy and use the authn/authz policy on accident.
- Change deprecation warnings in code to reference the docs by name
  instead of by URL.

1 files changed, 0 insertions, 4 deletions

diff --git a/tests/test_router.py b/tests/test_router.py
index f6b7f64d3..6fa9f9a5b 100644
--- a/tests/test_router.py
+++ b/tests/test_router.py
@@ -1699,10 +1699,6 @@ class DummyResponse(object):
         return self.app_iter
 
 
-class DummyAuthenticationPolicy:
-    pass
-
-
 class DummyLogger:
     def __init__(self):
         self.messages = []