RtlDeleteNoSplay - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTRTL_H

NTSYSAPI
VOID
NTAPI
RtlDeleteNoSplay(
    _In_ PRTL_SPLAY_LINKS Links,
    _Inout_ PRTL_SPLAY_LINKS *Root
    );

#endif

View code on GitHub

This function is documented in Windows Driver Kit.