Revert "remove unused variables" #1208

Job	Run time
clickable (Debug, amd64, glew)	11m 2s
clickable (Debug, amd64, sdl)	10m 42s
clickable (Debug, armhf, glew)	10m 18s
clickable (Debug, armhf, sdl)	9m 24s
clickable (Release, amd64, glew)	10m 13s
clickable (Release, amd64, sdl)	10m 32s
clickable (Release, arm64, glew)	10m 54s
clickable (Release, arm64, sdl)	10m 34s
clickable (Release, armhf, glew)	9m 27s
clickable (Release, armhf, sdl)	9m 1s
	1h 42m 7s

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