Remove photo prefix from every exif property name
Summary:
Remove the 'photo' prefix from every exif property,
as this is pretty redundant
CCBUG: 343273
Reviewers: ngraham, bruns
Reviewed By: ngraham
Subscribers: kde-frameworks-devel, Baloo
Tags: Frameworks, Baloo
Differential Revision: https://phabricator.kde.org/D21772