Fix cache metrics not being updated when not using the legacy exposition module. (#13717)

1 files changed, 0 insertions, 7 deletions

diff --git a/synapse/metrics/_legacy_exposition.py b/synapse/metrics/_legacy_exposition.py

index 133f1603dd..563d8cc2c6 100644
--- a/synapse/metrics/_legacy_exposition.py
+++ b/synapse/metrics/_legacy_exposition.py
@@ -34,8 +34,6 @@ from prometheus_client.core import Sample
 from twisted.web.resource import Resource
 from twisted.web.server import Request
 
-from synapse.util import caches
-
 CONTENT_TYPE_LATEST = "text/plain; version=0.0.4; charset=utf-8"
 
 
@@ -107,11 +105,6 @@ def generate_latest(registry: CollectorRegistry, emit_help: bool = False) -> byt
     by prometheus-client.
     """
 
-    # Trigger the cache metrics to be rescraped, which updates the common
-    # metrics but do not produce metrics themselves
-    for collector in caches.collectors_by_name.values():
-        collector.collect()
-
     output = []
 
     for metric in registry.collect():