Kernel/Userspace: Replace my custom SHM system with SysV shm

This allows xbanan to use shm!

userspace/libraries/LibC/sys/banan-os.cpp

@@ -16,21 +16,3 @@ int load_keymap(const char* path)
 {
 	return syscall(SYS_LOAD_KEYMAP, path);
 }
-
-long smo_create(size_t size, int prot)
-{
-	return syscall(SYS_SMO_CREATE, size, prot);
-}
-
-int smo_delete(long key)
-{
-	return syscall(SYS_SMO_DELETE, key);
-}
-
-void* smo_map(long key)
-{
-	long ret = syscall(SYS_SMO_MAP, key);
-	if (ret < 0)
-		return nullptr;
-	return reinterpret_cast<void*>(ret);
-}