Removed Travis icon
Removed Travis icon

Travis CI currently has issues correctly building Swift projects for Xcode 7.3. I removed the misleading build fail icon because the builds actually do not fail and all unit tests are green. I bring it back when Travis CI fixed their internal build issues.
SwiftyBeaver/SwiftyBeaver,SwiftyBeaver/SwiftyBeaver,SwiftyBeaver/SwiftyBeaver