Remove unused /colors/pet_types route

I built this API endpoint in anticipation of a change I never actually
made! I'll just remove it for now, leaning toward cleanuppery over
holding onto something I'm not sure about.

app/controllers/pet_types_controller.rb

@@ -1,37 +1,4 @@
 class PetTypesController < ApplicationController
-	def index
-		color = Color.find params[:color_id]
-		pet_types = color.pet_types.includes(pet_states: [:swf_assets]).
-			includes(:species)
-
-		# This is a relatively big request, for relatively static data. Let's
-		# consider it fresh for 10min (so new pet releases show up quickly), but
-		# it's also okay for the client to quickly serve the cached copy then
-		# reload in the background, if it's been less than a day.
-		expires_in 10.minutes, stale_while_revalidate: 1.day, public: true
-
-		# We dive deep to get all the right fields for appearance data, cuz this
-		# endpoint is primarily used to power the preview on the item page!
-		render json: pet_types.map { |pt|
-			pt.as_json(
-				only: [:id, :body_id],
-				include: {
-					species: {only: [:id], methods: [:name, :human_name]},
-					canonical_pet_state: {
-						only: [:id],
-						methods: [:pose],
-						include: {
-							swf_assets: {
-								only: [:id, :known_glitches],
-								methods: [:zone, :restricted_zones, :urls],
-							},
-						},
-					},
-				},
-			)
-		}
-	end
-
 	def show
 		@pet_type = PetType.
 			where(species_id: params[:species_id]).

config/routes.rb

@@ -33,9 +33,6 @@ OpenneoImpressItems::Application.routes.draw do
     end
     resources :alt_styles, path: 'alt-styles', only: [:index]
   end
-  resources :colors, only: [] do
-    resources :pet_types, only: [:index]
-  end
   resources :alt_styles, path: 'alt-styles', only: [:index]
 
   # Loading and modeling pets!