To remove profile picture from your google account through mobile/pc :-
Step 1: Open your Gmail Account in your mobile/pc
Step 2: Click on the photo on the top right corner and there you will find manage your google account, just click on it.
Step 3: Click on Personal Info.
Step 4: Then click on 'go to about me' section
Step 5: a) Then just click on your profile picture and you will find the remove button in your pc
b) In mobile, you will find manage your profile and click on it and remove your profile picture
By these steps, you can easily remove your profile picture from your google account.
Hope guys, this article will help you in removing your profile picture.