CI

Removed legacy PostProcess demo (#332) #167

# to view logs

Run time

Learn about OS # on GitHub Actions

Job	Run time
build (4.2.5, html5)	12m 43s
build (4.2.5, hl)	18m 9s
build (4.2.5, neko)	16m 56s
build (4.2.5, flash)	11m 37s
build (4.2.5, cpp)	19m 35s
build (4.3.3, html5)	13m 38s
build (4.3.3, hl)	23m 16s
build (4.3.3, neko)	20m 51s
build (4.3.3, flash)	11m 47s
build (4.3.3, cpp)	19m 23s
build (latest, html5)	8m 36s
build (latest, hl)	11m 57s
build (latest, neko)	12m 56s
build (latest, flash)	11m 35s
build (latest, cpp)	2m 4s
	3h 35m 3s