staging/easycap: remove AUDIOTIME feature

remove code guarded by AUDIOTIME define
This was experimental code in which I tried  improve audio-video
synchronization but it didn't work well

Cc: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>