parasite: clean up parasite_dump_thread_seized

It is never called for thread leaders, because they are dumped by
dump_task_core_all
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

parasite-syscall.c

@@ -486,15 +486,13 @@ int parasite_dump_thread_seized(struct parasite_ctl *ctl, int id,
 				struct pid *tid, CoreEntry *core)
 {
 	struct parasite_dump_thread *args;
+	pid_t pid = tid->real;
+	user_regs_struct_t regs_orig;
 	int ret;
 
-	args = parasite_args(ctl, struct parasite_dump_thread);
+	BUG_ON(id == 0); /* Leader is dumped in dump_task_core_all */
 
-	if (id == 0)
-		ret = parasite_execute_daemon(PARASITE_CMD_DUMP_THREAD, ctl);
-	else {
-		pid_t pid = tid->real;
-		user_regs_struct_t regs_orig;
+	args = parasite_args(ctl, struct parasite_dump_thread);
 
 	ret = ptrace(PTRACE_GETREGS, pid, NULL, &regs_orig);
 	if (ret) {
@@ -529,7 +527,6 @@ int parasite_dump_thread_seized(struct parasite_ctl *ctl, int id,
 
 	BUG_ON(!core->thread_core->sas);
 	copy_sas(core->thread_core->sas, &args->sas);
-	}
 
 	CORE_THREAD_ARCH_INFO(core)->clear_tid_addr = encode_pointer(args->tid_addr);
 	tid->virt = args->tid;