Replace do_restore_instream_cleanup with scoped_restore

This changes the users of do_restore_instream_cleanup to use a
scoped_restore instead.  This patch is broken out because it warrants
some additional attention: in particular it's unclear to me whether
current_ui can change in the body of these functions -- but if it can,
then the cleanup would have modified a different UI's instream member.

ChangeLog
2017-08-03  Tom Tromey  <tom@tromey.com>

	* top.h (do_restore_instream_cleanup): Remove.
	* top.c (do_restore_instream_cleanup): Remove.
	(read_command_file): Use scoped_restore.
	* cli/cli-script.c (execute_user_command): Use scoped_restore.

1 files changed, 0 insertions, 2 deletions

diff --git a/gdb/top.h b/gdb/top.h
index 5d7cb1f..4579889 100644
--- a/gdb/top.h
+++ b/gdb/top.h
@@ -290,8 +290,6 @@ extern void show_history (char *, int);
 
 extern void set_verbose (char *, int, struct cmd_list_element *);
 
-extern void do_restore_instream_cleanup (void *stream);
-
 extern char *handle_line_of_input (struct buffer *cmd_line_buffer,
 				   char *rl, int repeat,
 				   const char *annotation_suffix);