rb: Remove an unnecessary return statement


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@669009 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/rb/lib/thrift/transport.rb b/lib/rb/lib/thrift/transport.rb
index d4c1b2b..0710bd7 100644
--- a/lib/rb/lib/thrift/transport.rb
+++ b/lib/rb/lib/thrift/transport.rb
@@ -124,7 +124,7 @@
     end
 
     def open?
-      return @transport.open?
+      @transport.open?
     end
 
     def open