Remove duplicate line in Releasenotes.md.

------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=191722477

Remove duplicate line in Releasenotes.md.
------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=191722477
68627717 · hoangtc · Oliver Woodman · e26cad1a · 68627717
Commit 68627717 authored Apr 05, 2018 by hoangtc Committed by Oliver Woodman Apr 07, 2018
Showing with 0 additions and 1 deletions
RELEASENOTES.md
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 * Optimize seeking in FMP4 by enabling seeking to the nearest sync sample within
  a fragment. This benefits standalone FMP4 playbacks, DASH and SmoothStreaming.
-* Optimize seeking in FMP4.
 * Moved initial bitrate estimate from `AdaptiveTrackSelection` to
  `DefaultBandwidthMeter`.
 * Updated default max buffer length in `DefaultLoadControl`.