Circular_kernel_2: Cleanup

[afabri]

Summary of Changes

No longer mention Lazy_circular_kernel_2 in the test. We leave it in benchmark though.

Release Management

• Affected package(s):
• Issue(s) solved (if any): fix Lazy_circular_kernel_2 #5459

[mglisse]

Note that I am not familiar at all with this package, I was probably just looking for the string "Lazy".
Maybe NT could be Exact_rational.

[afabri]

I just also cleaned up the benchmarks a little bit.

When grepping for "lazy" I discovered the file CGAL/Simple_circular_kernel_2.h which neither in an example nor in a test.

[maxGimeno]

tested in https://cgal.geometryfactory.com/CGAL/testsuite/results-5.4-Ic-26.shtml