x86/kgdb: Fix a kerneldoc warning when build with W=1

When compiled with W=1, the following warning is generated:

  arch/x86/kernel/kgdb.c:698: warning: Cannot understand  *
   on line 698 - I thought it was a doc line

Remove the corresponding empty comment line to fix the warning.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/aad659537c1d4ebd86912a6f0be458676c8e69af.1695401178.git.christophe.jaillet@wanadoo.fr

arch/x86/kernel/kgdb.c

@@ -695,7 +695,6 @@ void kgdb_arch_exit(void)
 }
 
 /**
- *
  *	kgdb_skipexception - Bail out of KGDB when we've been triggered.
  *	@exception: Exception vector number
  *	@regs: Current &struct pt_regs.