SMARTTVS-4874: ATEME 4.21.4 subtitles duplicated (different endTime)

Author: aica231

lib/text/cue.js

@@ -367,7 +367,11 @@ shaka.text.Cue = class {
     // performance optimization.  We can avoid the more expensive recursive
     // checks if the top-level properties don't match.
     // See: https://github.com/shaka-project/shaka-player/issues/3018
-    if (cue1.startTime != cue2.startTime || cue1.endTime != cue2.endTime ||
+    if (cue1.startTime != cue2.startTime ||
+      // With Ateme 4.21.4 subtitles we have cues with the same startTime and
+      // payload but with different endTime (around 15 milliseconds).
+      // It causes the subtitles to be duplicated.
+      // cue1.endTime != cue2.endTime ||
       cue1.payload != cue2.payload) {
       return false;
     }