docs: remove xpack.apm.searchAggregatedTransactions (#149896)

### Summary

This PR reverts https://github.com/elastic/kibana/pull/82379 and removes
`xpack.apm.searchAggregatedTransactions` from the documentation. This is
for https://github.com/elastic/apm-server/pull/10140:

> Removing transaction metrics config as they are not officially
supported.
This commit is contained in:
Brandon Morelli 2023-01-30 14:33:03 -08:00 committed by GitHub
parent 58cd6370a2
commit b90ddba882
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@ -74,11 +74,6 @@ Maximum number of child items displayed when viewing trace details. Defaults to
`xpack.observability.annotations.index` {ess-icon}::
Index name where Observability annotations are stored. Defaults to `observability-annotations`.
`xpack.apm.searchAggregatedTransactions` {ess-icon}::
Enables Transaction histogram metrics. Defaults to `auto` so the UI will use metric indices over transaction indices for transactions if aggregated transactions are found. When set to `always`, additional configuration in APM Server is required. When set to `never` and aggregated transactions are not used.
+
See {apm-guide-ref}/transaction-metrics.html[Configure transaction metrics] for more information.
`xpack.apm.metricsInterval` {ess-icon}::
Sets a `fixed_interval` for date histograms in metrics aggregations. Defaults to `30`.