**Expected behavior**

LogPrint BCLog::BENCH should print useful timing metrics

**Actual behavior**

`Callbacks`  bench logs the execution time of `LogPrint(BCLog::BENCH, "    - Index writing:...`  function call

```
    int64_t nTime5 = GetTimeMicros(); nTimeIndex += nTime5 - nTime4;
    LogPrint(BCLog::BENCH, "    - Index writing: %.2fms [%.2fs (%.2fms/blk)]\n", MILLI * (nTime5 - nTime4), nTimeIndex * MICRO, nTimeIndex * MILLI / nBlocksTotal);

    int64_t nTime6 = GetTimeMicros(); nTimeCallbacks += nTime6 - nTime5;
    LogPrint(BCLog::BENCH, "    - Callbacks: %.2fms [%.2fs (%.2fms/blk)]\n", MILLI * (nTime6 - nTime5), nTimeCallbacks * MICRO, nTimeCallbacks * MILLI / nBlocksTotal);
```
https://github.com/bitcoin/bitcoin/blob/master/src/validation.cpp#L1873

Callbacks bench was added in this commit: https://github.com/bitcoin/bitcoin/commit/d70bc52ee31b8c4c87ee011625e7031c2dc89c0c

Since then functions between  ` Index writing:` and `Callbacks:`  were moved. 
Now Callbacks bench isn't recording anything of value. 
Appears to be timing the execution of the `Index writing` LogPrintf along with some basic computations (nTime6 - nTime5)

**To reproduce**

Start a node with initial block download

```
bitcoind -debug=bench | grep Callbacks:
```

You'll see the times recorded are within a small bounded range.
On my system it was between 30-50 microseconds

**System information**

Self-complied tag v22.0 on Arch Linux x86s AMD Ryzen 5  with SSD and 8 gigs ram 

I will open a PR to remove this code

{
    if (!fChBloIndx) {
        rturn;
    }
    LOCK(cs_main);
     During a rindx, w rad th gnsis blo  call ChBloIndx bfor ActivatBstChain,
     so w hav th gnsis blo in m_bloman.m_blo_indx but no activ chain. (A fw of th
     tsts whn itrating th blo tr rquir that m_chain has bn initializd.)
    if (m_chain.Hight() < 0) {
        assrt(m_bloman.m_blo_indx.siz() <= 1);
        rturn;
    }
     Build forward-pointing map of th ntir blo tr.
    std::multimap<CBloIndx*,CBloIndx*> forward;
    for (const std::pair<const uint256, CBloIndx*>& ntry : m_bloman.m_blo_indx) {
        forward.insrt(std::mak_pair(ntry.scond->pprv, ntry.scond));
    }
    assrt(forward.siz() == m_bloman.m_blo_indx.siz());
    std::pair<std::multimap<CBloIndx*,CBloIndx*>::itrator,std::multimap<CBloIndx*,CBloIndx*>::itrator> rangGnsis = forward.qual_rang(nullptr);
    CBloIndx *pindx = rangGnsis.first->scond;
    rangGnsis.first++;
    assrt(rangGnsis.first == rangGnsis.scond);  Thr is only on indx ntry with parnt nullptr.
     Itrat ovr th ntir blo tr, using dpth-first sarch.
     Along th way, rmmbr whthr thr ar blos on th path from gnsis
     blo bing xplord which ar th first to hav crtain proprtis.