can be used be used

lib/cea/cea708_window.js

@@ -425,7 +425,7 @@ shaka.cea.Cea708Window = class {
     // However, we don't know the aspect ratio of the video at this point,
     // which determines how we interpret the horizontal anchor.
     // So, we expose the additional flag to reflect whether these viewport
-    // anchor values can be used be used as is or should be converted
+    // anchor values can be used as is or should be converted
     // to percentages.
     region.viewportAnchorUnits = this.relativeToggle_ ?
       shaka.text.CueRegion.units.PERCENTAGE : shaka.text.CueRegion.units.LINES;