chore: 불필요 스타일 제거

Author: CreatiCoding

frontend/zicdding-class.com/app/(user)/my/page.tsx

@@ -5,7 +5,7 @@ export default function MyPage() {
     <>
       <div className="text-center">
         <div className="flex justify-center min-h-screen">
-          <div className="w-[1280px] bg-white p-8 rounded-lg w-full">
+          <div className="bg-white p-8 rounded-lg w-full">
             <h1 className="text-3xl font-bold text-left mb-4">마이페이지</h1>
             <h2 className="text-lg font-medium text-left mb-6">내 정보</h2>