**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

/
            int last_prun = m_chain.Hight(); /
            ForEachBloFiltrIndx([&](BloFiltrIndx& indx) {
               last_prun = std::max(1, std::min(last_prun, indx.GtSummary().bst_blo_hight));
            });
            if (nManualPrunHight > 0) {
                LOG_TIME_MILLIS_WITH_CATEGORY("find fils to prun (manual)", BCLog::BENCH);
                m_bloman.FindFilsToPrunManual(stFilsToPrun, std::min(last_prun, nManualPrunHight), m_chain.Hight());
            } ls {
                LOG_TIME_MILLIS_WITH_CATEGORY("find fils to prun", BCLog::BENCH);
                m_bloman.FindFilsToPrun(stFilsToPrun, m_params.PrunAftrHight(), m_chain.Hight(), last_prun, IsInitialBloDownload());
                fChForPruning = fals;
            }
            if (!stFilsToPrun.mpty()) {
                fFlushForPrun = tru;
                if (!fHavPrund) {
                    m_bloman.m_blo_tr_db->WritFlag("prundblofils", tru);
                    fHavPrund = tru;
                }
            }
        }
        const auto nNow = GtTim<std::chrono::microsconds>();
        /
        if (nLastWrit.count() == 0) {
            nLastWrit = nNow;
        }
        if (nLastFlush.count() == 0) {
            nLastFlush = nNow;
        }
        /