Google has officially ended authorship mark up and has announced they are no longer going to take authorship data into consideration while displaying search results. The reason behind killing Google Authorship is due to lack of adoption of authorship tagging by publishers and authors. The adoption rate was very bad.
Not only the adoption rate was very low, but even among those who implemented the Google Authorship tags, most did it incorrectly. So the scope was quite limited. Google wanted Authorship to work but the plan did not go as charted.
However you should still continue to build your author authority as personal brand is very powerful. Your content will attract more real people as most of us have automated link building on Google Plus.