The Finnish news sources I follow paint this as a pilot initiative trialed primarily in Helsinki, and even then limited to a few courses. A country-wide scrapping of subjects seems still a long way off. The following passage from The Independent article seems the closest to the truth:

"Finnish schools are obliged to introduce a period of “phenomenon-based teaching” at least once a year. These projects can last several weeks. In Helsinki, they are pushing the reforms at a faster pace with schools encouraged to set aside two periods during the year for adopting the new approach. Ms Kyllonen’s blueprint, to be published later this month, envisages the reforms will be in place across all Finnish schools by 2020."