ui: remove excessive strtolocal() from debuguigetpass

ui.getpass() returns Optional[bytes], and strtolocal(bytes) would crash.
Follows up 07b0a687c01a "ui: ensure `getpass()` returns bytes."

mercurial/debugcommands.py

@@ -3787,9 +3787,7 b' def debugtemplate(ui, repo, tmpl, **opts'
 def debuguigetpass(ui, prompt=b''):
     """show prompt to type password"""
     r = ui.getpass(prompt)
-    if r is not None:
-        r = encoding.strtolocal(r)
-    else:
+    if r is None:
         r = b"<default response>"
     ui.writenoi18n(b'response: %s\n' % r)