移除1.75播放速度

packages/artplayer/src/contextmenu/playbackRate.js

@@ -12,7 +12,6 @@ export default function playbackRate(menuOption) {
                 <span data-rate="1.0" class="normal current">${i18n.get('Normal')}</span>
                 <span data-rate="1.25">1.25</span>
                 <span data-rate="1.5">1.5</span>
-                <span data-rate="1.75">1.75</span>
                 <span data-rate="2.0">2.0</span>
             `,
             click: event => {
@@ -28,7 +27,9 @@ export default function playbackRate(menuOption) {
                     const $current = Array.from($menu.querySelectorAll('span')).find(
                         item => Number(item.dataset.rate) === rate,
                     );
-                    inverseClass($current, 'current');
+                    if ($current) {
+                        inverseClass($current, 'current');
+                    }
                 });
             },
         };