change seek bar color and remove volume bar color change

Author: OothecaPickle

src/renderer/components/ft-shaka-video-player/ft-shaka-video-player.js

@@ -829,10 +829,7 @@ export default defineComponent({
           contextMenuElements: ['ft_stats'],
           enableTooltips: true,
           seekBarColors: {
-            played: 'var(--primary-color)'
-          },
-          volumeBarColors: {
-            level: 'var(--primary-color)'
+            played: 'var(--red-500)'
           },
 
           // these have their own watchers