fix: delete unused placeholder

src/pages/note.jsx

@@ -1,5 +1,4 @@
 import ReactMarkdown from "react-markdown";
-import NotePlaceholder from "../components/notePlaceholder";
 import { useState, useEffect } from "react";
 import { useParams } from "react-router-dom";
 import printDate from "../components/utils";
@@ -41,9 +40,9 @@ function Note() {
         </div>
       </div>
     );
+  } else {
+    return <div />;
   }
-
-  return <NotePlaceholder />;
 }
 
 export default Note;

src/pages/save-local.jsx

@@ -1,6 +1,5 @@
 import { useEffect } from "react";
 import { useNavigate } from "react-router-dom";
-import NotePlaceholder from "../components/notePlaceholder";
 
 function uuidv4() {
   return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, (c) =>
@@ -37,7 +36,7 @@ function Save() {
     }
   }, []);
 
-  return <NotePlaceholder />;
+  return <div />;
 }
 
 export default Save;