FreeSWITCH

FS-11282: Remove iOS 'controls' hack, not needed

iOS requires a 'playsinline' attribute to be added to video tags, however a
'controls' attribute was erroneously added, and is unneeded.

See https://github.com/webrtc/samples/issues/929#issuecomment-330816567 and
following comments for confirmation.

Removing this attribute reduces UI noise and 'click contention' on video
elements.