save 버튼 삭제

src/main/resources/static/index.html

@@ -334,7 +334,6 @@
                     <input type="file" class="upload-input-device" accept=".json" style="display: none;">
                     <button class="select-file-btn-device">Load Local Device File</button>
                 </div>
-                <button class="save-file">Save to Device</button>
                 <button class="download-device-file">Download Device File</button>
             </div>
         </section>