After migration from iPhoto to Photos the library is duplicated
After migrating from iPhoto to Photo's I now have 2 x 42GB folders of pictures under 'Pictures'; (1) 'Photo's Library' and (2) 'iPhoto Library' ('Kind' says 'Migrated Photo Library'). Can I safely delete the folder marked 'iPhoto Library' in order to save disc space and speed back up - without fear? Using Time Machine religously.
[OSX Yosemite v10.10.3, MAC 21.5 inch, late 2012].
iMac (21.5-inch, Late 2012), OS X Yosemite (10.10.3)