Remove .ruby-version
Remove .ruby-version

We may revert this commit. Removes .ruby-version to not forcefully tie
to system ruby version.

Quick/Nimble,Quick/Nimble,dgdosen/Nimble,jeffh/Nimble,AnthonyMDev/Nimble,abbeycode/Nimble,twobitlabs/Nimble,Quick/Nimble,twobitlabs/Nimble,abbeycode/Nimble,DanielAsher/Nimble,dgdosen/Nimble,jeffh/Nimble,abbeycode/Nimble,jeffh/Nimble,phatblat/Nimble,abbeycode/Nimble,phatblat/Nimble,AnthonyMDev/Nimble,twobitlabs/Nimble,dgdosen/Nimble,AnthonyMDev/Nimble,dgdosen/Nimble,jeffh/Nimble,phatblat/Nimble,DanielAsher/Nimble,DanielAsher/Nimble