rm invalid file

source/dnode/mnode/impl/inc/mndIdx.h

-#ifndef _TD_MND_IDX_H_
-#define _TD_MND_IDX_H_
-
-#include "mndInt.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-int32_t  mndInitIdx(SMnode *pMnode);
-void     mndCleanupIdx(SMnode *pMnode);
-SIdxObj *mndAcquireIdx(SMnode *pMnode, char *Name);
-void     mndReleaseIdx(SMnode *pMnode, SIdxObj *pSma);
-int32_t  mndDropIdxsByStb(SMnode *pMnode, STrans *pTrans, SDbObj *pDb, SStbObj *pStb);
-int32_t  mndDropIdxsByDb(SMnode *pMnode, STrans *pTrans, SDbObj *pDb);
-int32_t  mndGetTableIdx(SMnode *pMnode, char *tbFName, STableIndexRsp *rsp, bool *exist);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_TD_MND_IDX_H_*/
\ No newline at end of file