chore: remove setting process name since procodile has gone

config/boot.rb

@@ -9,8 +9,3 @@ require_relative '../lib/postal/config'
 Postal.check_config!
 
 ENV['RAILS_ENV'] = Postal.config.rails&.environment || 'development'
-
-if ENV['PROC_NAME']
-  $0="[postal] #{ENV['PROC_NAME']}"
-end
-