Remove optional dependencies #2188

Job	Run time
macos-14 (CMake) (LLVM)	6m 0s
freebsd14 (CMake) (LLVM)	8m 1s
debian:unstable (CMake) (GNU)	3m 12s
fedora:rawhide (CMake) (GNU)	3m 23s
debian:12 (Latest Mapnik) (CMake) (GNU)	3m 58s
ubuntu:devel (CMake) (GNU)	3m 12s
openbsd7 (CMake) (LLVM)	15m 49s
ubuntu:24.04 (Latest Mapnik) (CMake) (GNU)	3m 45s
ubuntu:24.04 (Autotools) (GNU)	2m 20s
ubuntu:24.04 (Autotools) (LLVM)	2m 23s
ubuntu:24.04 (CMake) (GNU)	3m 21s
ubuntu:24.04 (CMake) (LLVM)	3m 20s
	58m 44s

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