uploads: removed unused /uploads/preprocess route.

app/models/upload.rb

@@ -18,7 +18,6 @@ class Upload < ApplicationRecord
   after_create :async_process_upload!
 
   scope :pending, -> { where(status: "pending") }
-  scope :preprocessed, -> { where(status: "preprocessed") }
   scope :completed, -> { where(status: "completed") }
   scope :failed, -> { where(status: "error") }
 

config/routes.rb

@@ -249,7 +249,6 @@ Rails.application.routes.draw do
   resources :tag_implications, only: [:show, :index, :destroy]
   resources :uploads do
     collection do
-      post :preprocess
       get :batch
       get :image_proxy
     end