remove unnecessary __IPHONE_OS_VERSION_MAX_ALLOWED checks
remove unnecessary __IPHONE_OS_VERSION_MAX_ALLOWED checks

fbernardo/stripe-ios,NewAmsterdamLabs/stripe-ios,stripe/stripe-ios,fbernardo/stripe-ios,stripe/stripe-ios,stripe/stripe-ios,stripe/stripe-ios,NewAmsterdamLabs/stripe-ios,fbernardo/stripe-ios,NewAmsterdamLabs/stripe-ios,stripe/stripe-ios,NewAmsterdamLabs/stripe-ios,fbernardo/stripe-ios,stripe/stripe-ios