diff --git a/jupyter_server/metrics.py b/jupyter_server/metrics.py
deleted file mode 100644
index 9f46951056..0000000000
--- a/jupyter_server/metrics.py
+++ /dev/null
@@ -1,24 +0,0 @@
-from .prometheus.metrics import HTTP_REQUEST_DURATION_SECONDS
-
-
-def prometheus_log_method(handler):
-    """
-    Tornado log handler for recording RED metrics.
-
-    We record the following metrics:
-       Rate - the number of requests, per second, your services are serving.
-       Errors - the number of failed requests per second.
-       Duration - The amount of time each request takes expressed as a time interval.
-
-    We use a fully qualified name of the handler as a label,
-    rather than every url path to reduce cardinality.
-
-    This function should be either the value of or called from a function
-    that is the 'log_function' tornado setting. This makes it get called
-    at the end of every request, allowing us to record the metrics we need.
-    """
-    HTTP_REQUEST_DURATION_SECONDS.labels(
-        method=handler.request.method,
-        handler='{}.{}'.format(handler.__class__.__module__, type(handler).__name__),
-        status_code=handler.get_status()
-    ).observe(handler.request.request_time())
diff --git a/jupyter_server/prometheus/log_functions.py b/jupyter_server/prometheus/log_functions.py
index 548c5fd8d4..6f13fc6eb8 100644
--- a/jupyter_server/prometheus/log_functions.py
+++ b/jupyter_server/prometheus/log_functions.py
@@ -1,4 +1,4 @@
-from jupyter_server.prometheus.metrics import HTTP_REQUEST_DURATION_SECONDS
+from .metrics import HTTP_REQUEST_DURATION_SECONDS
 
 
 def prometheus_log_method(handler):