Update index-settings.md (opensearch-project#7023)

Removed indices.time_series_index.default_index_merge_policy (String) from cluster-level settings.

Signed-off-by: Heather Halter <[email protected]>

_install-and-configure/configuring-opensearch/index-settings.md

@@ -35,8 +35,6 @@ OpenSearch supports the following cluster-level index settings. All settings in
 
 - `indices.recovery.max_concurrent_remote_store_streams` (Integer): The number of streams to the remote repository that can be opened in parallel when recovering a remote store index. Default is `20`. 
 
-- `indices.time_series_index.default_index_merge_policy` (String): This setting allows you to specify the default merge policy for time-series indexes, particularly for those with an `@timestamp` field, such as data streams. The two available options are `tiered` (default) and `log_byte_size`. Using `log_byte_size` for time-series indexes is recommended for enhancing the performance of range queries with the `@timestamp` field. To override the merge policy on a per-index basis, you can use the `index.merge.policy` index setting. 
-
 - `indices.fielddata.cache.size` (String): The maximum size of the field data cache. May be specified as an absolute value (for example, `8GB`) or a percentage of the node heap (for example, `50%`). This value is static so you must specify it in the `opensearch.yml` file. If you don't specify this setting, the maximum size is unlimited. This value should be smaller than the `indices.breaker.fielddata.limit`. For more information, see [Field data circuit breaker]({{site.url}}{{site.baseurl}}/install-and-configure/configuring-opensearch/circuit-breaker/#field-data-circuit-breaker-settings).
 
 ## Index-level index settings