Remove model_depth property (#692)

Summary:
Pull Request resolved: facebookresearch/ClassyVision#692

Pull Request resolved: facebookresearch#118

Pull Request resolved: fairinternal/ssl_scaling#55

Pull Request resolved: fairinternal/ClassyVision#89

Reviewed By: mannatsingh

Differential Revision: D25854102

fbshipit-source-id: fed678ed7115698bc532bd30f653dd94a7b32a26

Remove model_depth property (#692)

Summary:
Pull Request resolved: facebookresearch/ClassyVision#692

Pull Request resolved: facebookresearch#118

Pull Request resolved: fairinternal/ssl_scaling#55

Pull Request resolved: fairinternal/ClassyVision#89

Reviewed By: mannatsingh

Differential Revision: D25854102

fbshipit-source-id: fed678ed7115698bc532bd30f653dd94a7b32a26