I use android mate and I've deleted all the other apps with it - but for these two, it says it's read only.
i have tried it with root explorer. in fact that is the program that told me it is read only.
go to data/app and rename it there. that will remove it. I had to do it from there to get rid of Amazon Store and Kindle.
I'm working on the social networking app right now. I'm not really a social person. Facebook isn't that important to me and i've never used it. if i get rid of it, i'll let you know how.