Do not use ActiveStorage variants, process original avatar

Variants are currently broken. So we process the original file with the
most common avatar dimensions and stripping metadata, then hash and
upload only that version.

app/controllers/avatars_controller.rb

@@ -5,22 +5,20 @@ class AvatarsController < ApplicationController
 
       sha256_hash = params[:hash]
       format = params[:format]&.to_sym || :png
-      size = params[:size]&.to_sym || :original
+      # size = params[:size]&.to_sym || :original
 
       unless user.avatar.filename.to_s == "#{sha256_hash}.#{format}"
         http_status :not_found and return
       end
 
-      blob = if size == :original
-               user.avatar.blob
-             else
-               # TODO Variants use the same custom storage key/path, which
-               # makes blob downloads always fetch the original version instead
-               # of the variant. Needs to be fixed/added in Rails.
-               user.avatar_variant(size: size)&.blob
-             end
+      # TODO See note for avatar_variant in user model
+      # blob = if size == :original
+      #          user.avatar.blob
+      #        else
+      #          user.avatar_variant(size: size)&.blob
+      #        end
 
-      data = blob.download
+      data = user.avatar.blob.download
       send_data data, type: "image/#{format}", disposition: "inline"
     else
       http_status :not_found