Revert "vaapivideomemory: Store surface allocation flags."
Revert "vaapivideomemory: Store surface allocation flags."

This reverts commit dd428cc4a12c2d5c694fcd3303811cf486002c9d because
it rewrites the buffer size whilst surface allocation flags are
stored when allocator_params_init() is called since fab890ce.

Fix: #239

GStreamer/gstreamer-vaapi,GStreamer/gstreamer-vaapi,ceyusa/gstreamer-vaapi,ceyusa/gstreamer-vaapi