[DOCS] Remove duplicated half-sentence from secure settings docs (#47498)

docs/reference/setup/secure-settings.asciidoc

@@ -10,7 +10,6 @@ NOTE: All commands here should be run as the user which will run Elasticsearch.
 IMPORTANT: Only some settings are designed to be read from the keystore. However,
 the keystore has no validation to block unsupported settings.
 Adding unsupported settings to the keystore will cause {es}
-Additional unsupported settings being added to the keystore will cause Elasticsearch
 to fail to start. See documentation for each setting to see if it is supported
 as part of the keystore.