To delete or change your profile picture, please, do the following:
Open Taimi;
Go to your Profile (icon in the bottom-right corner);
Tap “View & edit profile”;
Tap “Edit” – you will see all the uploaded photos in your profile;
Click on the photo and choose “Set as Main Photo”/"Delete Photo" to update/delete your profile picture.
Result: your profile picture is updated/deleted. Note: To delete a profile photo you should have at least 1 moderated picture uploaded to the profile except your current profile picture.