[rb] do not delete the reason message from the guard, we need it later

Author: titusfortner

rb/lib/selenium/webdriver/support/guards/guard.rb

@@ -36,7 +36,7 @@ def initialize(guarded, type, guards = nil)
             @messages[:unknown] = 'TODO: Investigate why this is failing and file a bug report'
             @type = type
 
-            @reason = @guarded.delete(:reason)
+            @reason = @guarded[:reason]
           end
 
           def message