remove obsolete cx11 checks, cmake 3 is required but any version
remove obsolete cx11 checks, cmake 3 is required but any version (ROOT 6.08 -> CMake 3.4.3+, 6.16 -> 3.6+, 6.22 -> 3.14+)
remove obsolete cx11 checks, cmake 3 is required but any version (ROOT 6.08 -> CMake 3.4.3+, 6.16 -> 3.6+, 6.22 -> 3.14+)