[FedCM] Remove traces of revoke

Now that revoke has been removed in https://crrev.com/c/3712167,
this removes the final few traces.

R=tanzachary@chromium.org

Bug: 1335232
Change-Id: I5e4e18ce358c8d68003fdc65b7d71cb98b83d5df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3727309
Reviewed-by: Yi Gu <yigu@chromium.org>
Commit-Queue: Christian Biesinger <cbiesinger@chromium.org>
Auto-Submit: Christian Biesinger <cbiesinger@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1018408}
diff --git a/credential-management/support/fedcm-manifest-not-in-list/fedcm.json b/credential-management/support/fedcm-manifest-not-in-list/fedcm.json
index 9d91979..c044a7f 100644
--- a/credential-management/support/fedcm-manifest-not-in-list/fedcm.json
+++ b/credential-management/support/fedcm-manifest-not-in-list/fedcm.json
@@ -2,5 +2,4 @@
   "accounts_endpoint": "../accounts.py",
   "client_metadata_endpoint": "../client_metadata.py",
   "id_token_endpoint": "../id_token.py",
-  "revocation_endpoint": "../revoke.py"
 }
diff --git a/credential-management/support/revoke.py b/credential-management/support/revoke.py
deleted file mode 100644
index ed6fe00..0000000
--- a/credential-management/support/revoke.py
+++ /dev/null
@@ -1,6 +0,0 @@
-def main(request, response):
-  if not b"hint" in request.POST:
-    return (500, [], "Missing hint")
-  if request.POST[b"hint"] == b"fail":
-    return (500, [], "Fail requested")
-  return (204, [], "")