cmake: cleanup #7

Job	Run time
Run tests (ubuntu-20.04, true, sudo apt install -y -qq gfortran liblapack-dev libmetis-dev libnau...	1m 57s
Run tests (ubuntu-20.04, false, sudo apt install -y -qq gfortran liblapack-dev libmetis-dev libna...	1m 59s
Run tests (ubuntu-22.04, true, sudo apt install -y -qq gfortran liblapack-dev libmetis-dev libnau...	2m 7s
Run tests (ubuntu-22.04, false, sudo apt install -y -qq gfortran liblapack-dev libmetis-dev libna...	2m 10s
Run tests (macos-13, false, brew install metis bash, CC=clang OSX=13)	4m 19s
Run tests (macos-13, false, brew install metis bash, CC=gcc-13 CXX=g++-13 OSX=13 ADD_CXXFLAGS=-Wl...	4m 16s
Run tests (macos-14, false, brew install metis bash, arm64, CC=gcc-13 CXX=g++-13 OSX=14 ADD_CXXFL...	2m 16s
	19m 4s

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