The parliament didn't remove the sun tax. I am not sure about this new, but this tax is still being applied. The main leftist party in Spain (Podemos) defended during the last campaign to remove this tax [1], and there is a citizen currently suing Spain for this tax in front of the EU [2]. The Real Decreto de Autoconsumo [3] is active.

[1] http://www.lamarea.com/2016/04/07/impuesto-al-sol (this is around after the link you added, in spanish). [2] http://gaceta.es/noticias/espanol-denuncia-impuesto-sol-gobi... [3] https://www.boe.es/boe/dias/2015/10/10/pdfs/BOE-A-2015-10927...