Style tweak re: TheLightCosine's feedback

Author: HD Moore

lib/msf/core/exploit.rb

@@ -1193,22 +1193,18 @@ def handler_enabled?
   # value can be one of the Handler::constants.
   #
   def handler(*args)
-    return unless (
-      payload_instance &&
-      handler_enabled?
-    )
+    return unless payload_instance
+    return unless handler_enabled?
     payload_instance.handler(*args)
   end
 
   #
   # Break out of the session wait loop (WfsDelay)
   #
   def interrupt_handler
-    return unless (
-      payload_instance &&
-      handler_enabled? &&
-      payload_instance.respond_to?(:interrupt_wait_for_session)
-    )
+    return unless payload_instance
+    return unless handler_enabled?
+    return unless payload_instance.respond_to?(:interrupt_wait_for_session)
     payload_instance.interrupt_wait_for_session()
   end