wrapfunction: use sysstr instead of bytes as argument in "remotenames"

This is as valid and simpler, it will help us to eventually get ride of
`safehasattr`.

hgext/remotenames.py

@@ -255,7 +255,7 b' def wrapprintbookmarks(orig, ui, repo, f'
 
 
 def extsetup(ui):
-    extensions.wrapfunction(bookmarks, b'_printbookmarks', wrapprintbookmarks)
+    extensions.wrapfunction(bookmarks, '_printbookmarks', wrapprintbookmarks)
 
 
 def reposetup(ui, repo):