Revert "zproject: Prevent having exactly 17/18 middlewares, for Python 3.11 bug."

This reverts commit cf0b803d50.

(cherry picked from commit 41f253774d)

zerver/middleware.py

@@ -755,7 +755,3 @@ class ZulipSCIMAuthCheckMiddleware(SCIMAuthCheckMiddleware):
             return response
 
         return None
-
-
-class ZulipNoopMiddleware(MiddlewareMixin):
-    pass

zproject/test_extra_settings.py

@@ -15,7 +15,6 @@ from .settings import (
     EXTERNAL_HOST,
     LOCAL_DATABASE_PASSWORD,
     LOGGING,
-    MIDDLEWARE,
 )
 
 FULL_STACK_ZULIP_TEST = "FULL_STACK_ZULIP_TEST" in os.environ
@@ -267,13 +266,3 @@ SCIM_CONFIG: Dict[str, SCIMConfigDict] = {
         "name_formatted_included": True,
     }
 }
-
-
-while len(MIDDLEWARE) < 19:
-    # The following middleware serves to skip having exactly 17 or 18
-    # middlewares, which can segfault Python 3.11 when running with
-    # coverage enabled; see
-    # https://github.com/python/cpython/issues/106092
-    MIDDLEWARE += [
-        "zerver.middleware.ZulipNoopMiddleware",
-    ]