um: Remove UML specific debug parameter

It does nothing but emit a warning when 'debug' is provided in the
kernel command line. It can be a bit annoying, as 'debug' is also a
valid kernel parameter to enable kernel debugging.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20241011040441.1586345-2-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Author: btw616

arch/um/kernel/um_arch.c

@@ -167,19 +167,6 @@ __uml_setup("root=", uml_root_setup,
 "        root=/dev/ubd5\n\n"
 );
 
-static int __init no_skas_debug_setup(char *line, int *add)
-{
-	os_warn("'debug' is not necessary to gdb UML in skas mode - run\n");
-	os_warn("'gdb linux'\n");
-
-	return 0;
-}
-
-__uml_setup("debug", no_skas_debug_setup,
-"debug\n"
-"    this flag is not needed to run gdb on UML in skas mode\n\n"
-);
-
 static int __init uml_console_setup(char *line, int *add)
 {
 	have_console = 1;