Delete version history from README

(moved to github release texts)

README.md

@@ -4,53 +4,4 @@
 This is a simple plugin that uses John Dyer's [MediaElement.js][1] to enable
 cross-browser HTML5 `<video>` and `<audio>` players for Omeka files.
 
-### Version History ###
-
-*2.5*
-
-* MediaElement.js 2.18.2
-* Handle "audio/mp4" type by default
-* New setting to control preloading
-* Fixed responsive player sizing in some themes and layouts
-* Updated translations
-
-*2.4*
-
-* MediaElement.js 2.16.3
-* Updated translations for all languages
-
-*2.3*
-
-* MediaElement.js 2.13.2
-* Added translation support for the player UI
-
-*2.2.1*
-
-* Fixed a notice bug when playing audio from 2.2
-
-*2.2*
-
-* MediaElement.js 2.13.1
-* Adds responsive sizing option for videos
-
-*2.1*
-
-* MediaElement.js 2.11.2
-* Adds width configuration for audio
-
-*2.0*
-
-* Adds support for Omeka 2
-* Removes support for Omeka 1
-
-*1.1*
-
-* MediaElement.js 2.10.1
-* Adds user configuration of media defaults
-
-*1.0*
-
-* MediaElement.js 2.6.5
-* Initial release
-
  [1]: http://mediaelementjs.com/