loongarch64: remove getrlimit/setrlimit syscall numbers

these are not supported by the kernel for new archs; prlimit64
replaces them.

arch/loongarch64/bits/syscall.h.in

@@ -158,8 +158,6 @@
 #define __NR_uname                      160
 #define __NR_sethostname                161
 #define __NR_setdomainname              162
-#define __NR_getrlimit                  163
-#define __NR_setrlimit                  164
 #define __NR_getrusage                  165
 #define __NR_umask                      166
 #define __NR_prctl                      167