rspec.rb in celluloid-0.17.3

- old
+ new

@@ -14,10 +14,9 @@
 
 module Specs
 
   CHECK_LOOSE_THREADS = !Nenv.ci? unless defined? CHECK_LOOSE_THREADS
   ALLOW_RETRIES = 3 unless defined? ALLOW_RETRIES
-  ALLOW_SLOW_MAILBOXES = false unless defined? ALLOW_SLOW_MAILBOXES
 
   INCLUDE_SUPPORT = [
     "env",
     "logging",
     "sleep_and_wait",