Remove Elasticsearch settings from application settings

...ting_columns/elasticsearch_analyzers_kuromoji_enabled.yml

...tting_columns/elasticsearch_analyzers_kuromoji_search.yml

...tting_columns/elasticsearch_analyzers_smartcn_enabled.yml

...etting_columns/elasticsearch_analyzers_smartcn_search.yml

config/application_setting_columns/elasticsearch_aws.yml

...lication_setting_columns/elasticsearch_aws_access_key.yml

.../application_setting_columns/elasticsearch_aws_region.yml

..._setting_columns/elasticsearch_client_request_timeout.yml

...ting_columns/elasticsearch_indexed_field_length_limit.yml

...ting_columns/elasticsearch_indexed_file_size_limit_kb.yml

...ig/application_setting_columns/elasticsearch_indexing.yml

...lication_setting_columns/elasticsearch_limit_indexing.yml

...on_setting_columns/elasticsearch_max_bulk_concurrency.yml

...cation_setting_columns/elasticsearch_max_bulk_size_mb.yml

...g_columns/elasticsearch_max_code_indexing_concurrency.yml

...lication_setting_columns/elasticsearch_pause_indexing.yml

...ication_setting_columns/elasticsearch_requeue_workers.yml

...cation_setting_columns/elasticsearch_retry_on_failure.yml

config/application_setting_columns/elasticsearch_search.yml

...ig/application_setting_columns/elasticsearch_username.yml