[glibc] linux: Remove unnecessary nice.c and signal.c

[glibc] linux: Remove unnecessary nice.c and signal.c

[Arjun Shankar]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2c4e368a418e12ba67cd4fb026c8b8f2dd605497

commit 2c4e368a418e12ba67cd4fb026c8b8f2dd605497
Author: Arjun Shankar <arjun@redhat.com>
Date:   Thu Jun 30 00:37:34 2022 +0200

    linux: Remove unnecessary nice.c and signal.c
    
    These files simply include the sysdeps/posix implementations which would
    be used even in the absence of the files.  They have been unnecessary
    since 7b17aeda0c5e when nice and signal were removed from the
    syscalls.list file.
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 sysdeps/unix/sysv/linux/nice.c   | 1 -
 sysdeps/unix/sysv/linux/signal.c | 3 ---
 2 files changed, 4 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/nice.c b/sysdeps/unix/sysv/linux/nice.c
deleted file mode 100644
index 3bcbb1e89a..0000000000
--- a/sysdeps/unix/sysv/linux/nice.c
+++ /dev/null
@@ -1 +0,0 @@
-#include <sysdeps/posix/nice.c>
diff --git a/sysdeps/unix/sysv/linux/signal.c b/sysdeps/unix/sysv/linux/signal.c
deleted file mode 100644
index bc4e4e8447..0000000000
--- a/sysdeps/unix/sysv/linux/signal.c
+++ /dev/null
@@ -1,3 +0,0 @@
-/* We need this file since otherwise `signal' would be handled as a
-   system call.  */
-#include <sysdeps/posix/signal.c>