Revert "MediaAttachment: Updates Delegate's API"
Revert "MediaAttachment: Updates Delegate's API"

This reverts commit f7e7bfa1f1a6a548af4e2b1622c0cc1f6377b65e.

wordpress-mobile/AztecEditor-iOS,wordpress-mobile/AztecEditor-iOS,wordpress-mobile/AztecEditor-iOS,wordpress-mobile/AztecEditor-iOS