uml: delete unused code

Get rid of a bunch of unused stuff -
	cpu_feature had no users
	linux_prog is little-used, so its declaration is moved to the
user for easy deletion when the whole file goes away
	a long-unused debugging aid in helper.c is gone

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/um/include/kern_util.h

@@ -23,7 +23,6 @@ struct kern_handlers {
 extern const struct kern_handlers handlinfo_kern;
 
 extern int ncpus;
-extern char *linux_prog;
 extern char *gdb_init;
 extern int kmalloc_ok;
 extern int jail;

arch/um/include/user_util.h

@@ -60,7 +60,6 @@ extern void kill_child_dead(int pid);
 extern int cont(int pid);
 extern void check_sigio(void);
 extern void arch_check_bugs(void);
-extern int cpu_feature(char *what, char *buf, int len);
 extern int arch_handle_signal(int sig, union uml_pt_regs *regs);
 extern int arch_fixup(unsigned long address, void *sc_ptr);
 extern void arch_init_thread(void);