"A proposition is considered to have objective truth when its truth conditions are met without bias caused by a sentient subject. Scientific objectivity refers to the ability to judge without partiality or external influence, sometimes used synonymously with neutrality."

If anyone cares this is a philosophical, and scientific definition. Objective truths can be ascertained by the scientific method, and it's successes in doing this are manifest. In answer to the OP and as I stated almost from the start, philosophy is a useful tool, if only for determining what is and what is not scientific. The strict principles of validation in the modern scientific method are derived from philosophy. I think to a certain extent science has usurped the philosophy as our best method for discovering objective truth, but it is not redundant by any means.