vaapi-recorder: Drop redundant license
vaapi-recorder: Drop redundant license

This file was provided under both the Expat and X11 variants of the MIT
license.  We don't need the latter, so remove it and leave just Expat.
And reformat the Expat license so it matches our standard boilerplate.

giucam/weston,krezovic/weston,udoprog/weston,Gnurou/weston,Fantu/compositor-spice,Fantu/compositor-spice,mchalupa/weston,eyolfson/weston,Tarnyko/weston-xdg_surface_present,xorgy/weston,eyolfson/weston,Fantu/compositor-spice,sir-murray/weston,xorgy/weston,sir-murray/weston,Gnurou/weston,udoprog/weston,jonnylamb/weston,kwm81/weston,krezovic/weston,giucam/weston,kwm81/weston,Tarnyko/weston-xdg_surface_present,jonnylamb/weston,mchalupa/weston