linux/profile.h: remove unnecessary declaration

Declaring struct pt_regs is unnecessary. On the one hand, there is no
function using it; on the other hand, struct pt_regs has been declared in
linux/kernel.h. Remove them.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Wan Jiabing <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/profile.h

···
 #define KVM_PROFILING	4
 
 struct proc_dir_entry;
-struct pt_regs;
 struct notifier_block;
 
 #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
···
 
 int profile_event_register(enum profile_type, struct notifier_block * n);
 int profile_event_unregister(enum profile_type, struct notifier_block * n);
-
-struct pt_regs;
 
 #else