ci(release): Remove Cocoapods and API docs publishing from Travis builds
ci(release): Remove Cocoapods and API docs publishing from Travis builds

These processes take a very long time, causing Travis to reach the 50 minute time limit. This caused
release builds to fail part-way through. Those 2 steps will need to be run manually after the
semantic-release script completes.

watson-developer-cloud/ios-sdk,watson-developer-cloud/ios-sdk,watson-developer-cloud/ios-sdk,watson-developer-cloud/ios-sdk,watson-developer-cloud/ios-sdk