remove metrics beta gate

lib/sidekiq/api.rb

@@ -6,10 +6,8 @@ require "zlib"
 require "set"
 require "base64"
 
-if ENV["SIDEKIQ_METRICS_BETA"]
-  require "sidekiq/metrics/deploy"
-  require "sidekiq/metrics/query"
-end
+require "sidekiq/metrics/deploy"
+require "sidekiq/metrics/query"
 
 module Sidekiq
   # Retrieve runtime statistics from Redis regarding

lib/sidekiq/cli.rb

@@ -425,4 +425,4 @@ module Sidekiq # :nodoc:
 end
 
 require "sidekiq/systemd"
-require "sidekiq/metrics/tracking" if ENV["SIDEKIQ_METRICS_BETA"]
+require "sidekiq/metrics/tracking"

lib/sidekiq/metrics/shared.rb

@@ -2,7 +2,6 @@ require "concurrent"
 
 module Sidekiq
   module Metrics
-    # TODO Support apps without concurrent-ruby
     Counter = ::Concurrent::AtomicFixnum
 
     # Implements space-efficient but statistically useful histogram storage.

lib/sidekiq/metrics/tracking.rb

@@ -121,14 +121,12 @@ module Sidekiq
   end
 end
 
-if ENV["SIDEKIQ_METRICS_BETA"] == "1"
-  Sidekiq.configure_server do |config|
-    exec = Sidekiq::Metrics::ExecutionTracker.new(config)
-    config.server_middleware do |chain|
-      chain.add Sidekiq::Metrics::Middleware, exec
-    end
-    config.on(:beat) do
-      exec.flush
-    end
+Sidekiq.configure_server do |config|
+  exec = Sidekiq::Metrics::ExecutionTracker.new(config)
+  config.server_middleware do |chain|
+    chain.add Sidekiq::Metrics::Middleware, exec
+  end
+  config.on(:beat) do
+    exec.flush
   end
 end

lib/sidekiq/web.rb

@@ -30,13 +30,10 @@ module Sidekiq
       "Queues" => "queues",
       "Retries" => "retries",
       "Scheduled" => "scheduled",
-      "Dead" => "morgue"
+      "Dead" => "morgue",
+      "Metrics" => "metrics"
     }
 
-    if ENV["SIDEKIQ_METRICS_BETA"] == "1"
-      DEFAULT_TABS["Metrics"] = "metrics"
-    end
-
     class << self
       def settings
         self