Remove cleanup.c inclusion from syscalls generation

Remove cleanup.c from syscalls.h as it is part of the old library and
its usage is discouraged. LSP(s) supporting C language correctly flag
this file as problematic. This patch ensures that the lapi/syscalls/regen.sh
script will no longer include cleanup.c, preventing unnecessary usage in
generated headers.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

include/lapi/syscalls/regen.sh

@@ -33,16 +33,17 @@ cat << EOF > "${output_pid}"
 #include <errno.h>
 #include <sys/syscall.h>
 #include <asm/unistd.h>
-#include "cleanup.c"
 
 #ifdef TST_TEST_H__
 #define TST_SYSCALL_BRK__(NR, SNR) ({ \\
 	tst_brk(TCONF, \\
 		"syscall(%d) " SNR " not supported on your arch", NR); \\
 })
 #else
+inline static void dummy_cleanup(void) {}
+
 #define TST_SYSCALL_BRK__(NR, SNR) ({ \\
-	tst_brkm(TCONF, CLEANUP, \\
+	tst_brkm(TCONF, dummy_cleanup, \\
 		"syscall(%d) " SNR " not supported on your arch", NR); \\
 })
 #endif