JAKARTA, May 29 (Reuters) – Indonesia’s PT Pertamina will develop its Cilacap refinery in Central Java “independently”, the state energy company said on Friday, dropping a plan to boost capacity through a joint venture with Saudi Aramco. The two companies have been in talks to upgrade the Cilacap refinery since 2016 and last year said that they would finalise a joint venture plan in the first quarter of 2020.