Remove unprotected ARM-specific syscall

src/posix/filesystem.c

@@ -279,20 +279,6 @@ int vlc_dup (int oldfd)
     return newfd;
 }
 
-#ifdef __ANDROID__ /* && we support android < 2.3 */
-/* pipe2() is declared and available since android-9 NDK,
- * although it is available in libc.a since android-3
- * We redefine the function here in order to be able to run
- * on versions of Android older than 2.3
- */
-#include <sys/syscall.h>
-//#include <sys/linux-syscalls.h> // fucking brokeness
-int pipe2(int fds[2], int flags)
-{
-    return syscall(/*__NR_pipe2 */ 359, fds, flags);
-}
-#endif /* __ANDROID__ */
-
 /**
  * Creates a pipe (see "man pipe" for further reference).
  */