Revert "Allow for price's currency to be null when decoding - fallback to dkk in that case"
Revert "Allow for price's currency to be null when decoding - fallback to dkk in that case"

This reverts commit 862870a2b2a1b2f39f34e87103868c52a0ab1484.

shopgun/shopgun-ios-sdk,shopgun/shopgun-ios-sdk