linux: Remove INTERNAL_SYSCALL_DECL

With all Linux ABIs using the expected Linux kABI to indicate
syscalls errors, the INTERNAL_SYSCALL_DECL is an empty declaration
on all ports.

This patch removes the 'err' argument on INTERNAL_SYSCALL* macro
and remove the INTERNAL_SYSCALL_DECL usage.

Checked with a build against all affected ABIs.

1 files changed, 1 insertions, 2 deletions

diff --git a/nptl/thrd_yield.c b/nptl/thrd_yield.c
index 865f123d73..3e0fd46a27 100644
--- a/nptl/thrd_yield.c
+++ b/nptl/thrd_yield.c
@@ -21,6 +21,5 @@
 void
 thrd_yield (void)
 {
-  INTERNAL_SYSCALL_DECL (err);
-  INTERNAL_SYSCALL_CALL (sched_yield, err);
+  INTERNAL_SYSCALL_CALL (sched_yield);
 }