signal: Remove unused definition of sig_user_definied

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

include/linux/signal.h

@@ -390,10 +390,6 @@ int unhandled_signal(struct task_struct *tsk, int sig);
 #define sig_kernel_ignore(sig)		siginmask(sig, SIG_KERNEL_IGNORE_MASK)
 #define sig_kernel_stop(sig)		siginmask(sig, SIG_KERNEL_STOP_MASK)
 
-#define sig_user_defined(t, signr) \
-	(((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) &&	\
-	 ((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_IGN))
-
 #define sig_fatal(t, signr) \
 	(!siginmask(signr, SIG_KERNEL_IGNORE_MASK|SIG_KERNEL_STOP_MASK) && \
 	 (t)->sighand->action[(signr)-1].sa.sa_handler == SIG_DFL)