CMake

Remove undefined CellReference::fromString #125

Job	Run time
build (ubuntu-latest, Debug, static, 5.12, x86_64)	36s
build (ubuntu-latest, Debug, static, 6.6.0, x86_64;arm64)	41s
build (ubuntu-latest, Debug, shared, 5.12, x86_64)	38s
build (ubuntu-latest, Debug, shared, 6.6.0, x86_64;arm64)	35s
build (ubuntu-latest, Release, static, 5.12, x86_64)	43s
build (ubuntu-latest, Release, static, 6.6.0, x86_64;arm64)	45s
build (ubuntu-latest, Release, shared, 5.12, x86_64)	34s
build (ubuntu-latest, Release, shared, 6.6.0, x86_64;arm64)	37s
build (windows-latest, Debug, static, 5.12, x86_64)	40s
build (windows-latest, Debug, static, 6.6.0, x86_64;arm64)	41s
build (windows-latest, Debug, shared, 5.12, x86_64)	35s
build (windows-latest, Debug, shared, 6.6.0, x86_64;arm64)	40s
build (windows-latest, Release, static, 5.12, x86_64)	1s
build (windows-latest, Release, static, 6.6.0, x86_64;arm64)	38s
build (windows-latest, Release, shared, 5.12, x86_64)	1s
build (windows-latest, Release, shared, 6.6.0, x86_64;arm64)	34s
build (macos-latest, Debug, static, 5.12, x86_64)	34s
build (macos-latest, Debug, static, 6.6.0, x86_64;arm64)	38s
build (macos-latest, Debug, shared, 5.12, x86_64)	38s
build (macos-latest, Debug, shared, 6.6.0, x86_64;arm64)	39s
build (macos-latest, Release, static, 5.12, x86_64)	1s
build (macos-latest, Release, static, 6.6.0, x86_64;arm64)	1s
build (macos-latest, Release, shared, 5.12, x86_64)	1s
build (macos-latest, Release, shared, 6.6.0, x86_64;arm64)	39s
	12m 10s

Provide feedback