add a without timestamp class

lib/shoryuken/logging.rb

@@ -3,10 +3,9 @@
 
 module Shoryuken
   module Logging
-    class Pretty < Logger::Formatter
-      # Provide a call() method that returns the formatted message.
-      def call(severity, time, _program_name, message)
-        "#{time.utc.iso8601} #{Process.pid} TID-#{Thread.current.object_id.to_s(36)}#{context} #{severity}: #{message}\n"
+    class Base < ::Logger::Formatter
+      def tid
+        Thread.current["sidekiq_tid"] ||= (Thread.current.object_id ^ ::Process.pid).to_s(36)
       end
 
       def context
@@ -15,6 +14,19 @@ def context
       end
     end
 
+    class Pretty < Base
+      # Provide a call() method that returns the formatted message.
+      def call(severity, time, _program_name, message)
+        "#{time.utc.iso8601} #{Process.pid} TID-#{tid}#{context} #{severity}: #{message}\n"
+      end
+    end
+
+    class WithoutTimestamp < Base
+      def call(severity, _time, _program_name, message)
+        "pid=#{Process.pid} tid=#{tid}#{context} #{severity}: #{message}\n"
+      end
+    end
+
     def self.with_context(msg)
       Thread.current[:shoryuken_context] = msg
       yield