HP: Unify SDK Quickstart to SaaSquatch docs
HP: Unify SDK Quickstart to SaaSquatch docs

The duplicate Quickstart guide here in github has been removed with the info now available in the saasquatch docs. The current version of the quickstart guide can be found in the docs here: https://docs.referralsaasquatch.com/mobile/ios/quickstart/
saasquatch/mobile-sdk-swift-cocoapod,saasquatch/mobile-sdk-swift-cocoapod