chore: revert Maps Beta Podfile
chore: revert Maps Beta Podfile

Change-Id: Ifd11b11a8485f5ef9d2a87261786a57171e653f5

googlemaps/maps-sdk-for-ios-samples,googlemaps/maps-sdk-for-ios-samples,googlemaps/maps-sdk-for-ios-samples,googlemaps/maps-sdk-for-ios-samples