PHRAS-3777 clean unused setting in configuration.yml #589

Job	Run time
build phraseanet-elasticsearch / build	34s
build phraseanet-nginx / build	3m 13s
build phraseanet-db / build	19s
build phraseanet-fpm / build	3m 24s
build phraseanet-setup / build	3m 27s
build phraseanet-worker / build	3m 32s
unit test	9m 55s
	24m 24s

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