It can't be removed....yet, it also can't be moved from it's homescreen position.....what i mean is, it is the first homescreen, so if you add more screens the Blinkfeed stays put, as in, Blink screen-2-3-4-5.
I would have liked to move it to another position ie, 1-2-Blink screen-4-5.
Installing Nova Launcher or another launcher app removes it, but then you lose the Sense widgets as well.
I'm still in 2 minds about it TBH, it looks useful if you like to keep up on various news feeds etc, but i would like it as my central homescreen.
So i switch between Nova and Sense Launcher now and again so i can try and get used to it.