patch 8.2.4727: unused code

Problem:    Unused code.
Solution:   Remove code and add #ifdefs. (Dominique Pellé, closes #10136)
diff --git a/runtime/doc/editing.txt b/runtime/doc/editing.txt
index 2bba058..74e1d92 100644
--- a/runtime/doc/editing.txt
+++ b/runtime/doc/editing.txt
@@ -1224,7 +1224,7 @@
 
 If you want to always use ":confirm", set the 'confirm' option.
 
-			*:browse* *:bro* *E338* *E614* *E615* *E616*
+			*:browse* *:bro* *E338*
 :bro[wse] {command}	Open a file selection dialog for an argument to
 			{command}.  At present this works for |:e|, |:w|,
 			|:wall|, |:wq|, |:wqall|, |:x|, |:xall|, |:exit|,