[SECURITY] XSS in 3rd party library Flowplayer

This commit also removes the sources because they are
not maintained anymore.

Resolves: #67458
Releases: master, 6.2
Security-Bulletin: TYPO3-CORE-SA-2015-007
Change-Id: I0813656e3617cb7944d0e620aa3e2863cc614d16
Reviewed-on: http://review.typo3.org/40810


Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>
Reviewed-by: Helmut Hummel <helmut.hummel@typo3.org>
Tested-by: Helmut Hummel <helmut.hummel@typo3.org>