fix(GRO-1361): remove unused X import and delete corrupted demo-pet images

- Remove unused 'X' import from lucide-react in PetProfiles.tsx
- Delete 10 corrupted demo-pet PNG files that contain Alibaba AccessDenied XML

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/portal/sections/PetProfiles.tsx

@@ -1,5 +1,5 @@
 import { useState, useEffect } from "react";
-import { PawPrint, Heart, Scissors, Clock, Edit3, Loader2, Star, X } from "lucide-react";
+import { PawPrint, Heart, Scissors, Clock, Edit3, Loader2, Star } from "lucide-react";
 import { PetForm } from "./PetForm.js";
 import type { Pet } from "@groombook/types";