silence prometheus

config/initializers/prometheus_exporter.rb

@@ -44,7 +44,7 @@ else
   # PrometheusExporter::Client is a singleton and we can't easily mock it out
   # in a test environment, and simply constructing a new instance attempts to
   # connect to a Prometheus server, which we can't rely on in a test environment.
-  $stderr.puts "PrometheusExporter is disabled in test, console, and rake task environments"
+  # $stderr.puts "PrometheusExporter is disabled in test, console, and rake task environments"
   module PrometheusExporter
     module Instrumentation
       class PeriodicStats