diff --git a/changelog.d/18052.removal b/changelog.d/18052.removal
new file mode 100644
index 0000000000..f173b9ba4d
--- /dev/null
+++ b/changelog.d/18052.removal
@@ -0,0 +1 @@
+Remove the unstable [MSC4151](https://github.com/matrix-org/matrix-spec-proposals/pull/4151) implementation. The stable support remains, per [Matrix 1.13](https://spec.matrix.org/v1.13/client-server-api/#post_matrixclientv3roomsroomidreport).
\ No newline at end of file
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index eb8d967e70..90d19849ff 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -436,9 +436,6 @@ class ExperimentalConfig(Config):
("experimental", "msc4108_delegation_endpoint"),
)
- # MSC4151: Report room API (Client-Server API)
- self.msc4151_enabled: bool = experimental.get("msc4151_enabled", False)
-
# MSC4210: Remove legacy mentions
self.msc4210_enabled: bool = experimental.get("msc4210_enabled", False)
diff --git a/synapse/rest/client/reporting.py b/synapse/rest/client/reporting.py
index 949f077035..c5037be8b7 100644
--- a/synapse/rest/client/reporting.py
+++ b/synapse/rest/client/reporting.py
@@ -20,13 +20,11 @@
#
import logging
-import re
from http import HTTPStatus
from typing import TYPE_CHECKING, Tuple
from synapse._pydantic_compat import StrictStr
from synapse.api.errors import AuthError, Codes, NotFoundError, SynapseError
-from synapse.api.urls import CLIENT_API_PREFIX
from synapse.http.server import HttpServer
from synapse.http.servlet import (
RestServlet,
@@ -127,16 +125,6 @@ class ReportRoomRestServlet(RestServlet):
self.clock = hs.get_clock()
self.store = hs.get_datastores().main
- # TODO: Remove the unstable variant after 2-3 releases
- # https://github.com/element-hq/synapse/issues/17373
- if hs.config.experimental.msc4151_enabled:
- self.PATTERNS.append(
- re.compile(
- f"^{CLIENT_API_PREFIX}/unstable/org.matrix.msc4151"
- "/rooms/(?P<room_id>[^/]*)/report$"
- )
- )
-
class PostBody(RequestBodyModel):
reason: StrictStr
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index ba1141bbe5..a1d089ebac 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -170,8 +170,6 @@ class VersionsRestServlet(RestServlet):
),
# MSC4140: Delayed events
"org.matrix.msc4140": bool(self.config.server.max_event_delay_ms),
- # MSC4151: Report room API (Client-Server API)
- "org.matrix.msc4151": self.config.experimental.msc4151_enabled,
# Simplified sliding sync
"org.matrix.simplified_msc3575": msc3575_enabled,
},
|