Cleanup ofShadow and ofCubemap #1581

Job	Run time
build-emscripten (emscripten)	3m 23s
build-msys2 (mingw64)	12m 1s
build-vs2019 (x64)	1m 5s
build-msys2 (clang64)	7m 42s
build-vs2022 (ARM64)	11m 35s
build-msys2 (ucrt64)	12m 28s
build-vs2022 (x64)	11m 43s
build-vs2022 (ARM64EC)	12m 34s
build-ios-tvos (ios, macos)	1m 37s
build-macos (osx, makefiles)	3m 31s
rpi-build (aarch64, arm64, aarch64-linux-gnu, 1)	3m 14s
build-macos (osx, xcode)	1m 22s
rpi-build (armv6l, armhf, arm-linux-gnueabihf, 1)	4m 47s
build-linux64 (linux64, 64gcc6)	5m 29s
build-ios-tvos (tvos, macos)	3m 1s
build-android (android, x86_64)	8m 2s
build-android (android, arm64-v8a)	7m 22s
build-android (android, armeabi-v7a)	7m 41s
	1h 58m 37s

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