mfxsinkbin: Removed duplicate force-aspect-ratio property.
mfxsinkbin: Removed duplicate force-aspect-ratio property.

Fixes #44

Signed-off-by: Lim Siew Hoon <e412356d7e67dbdde94e841e5d46937fb9f4e623@intel.com>

ph0b/gstreamer-media-SDK,ishmael1985/gstreamer-media-SDK