Move some removed tests

[pkofod]

• [ ] Counter: Find a situation where all the (non-trivial) linesearches require at least two evals (e.g. Himmelblau above?)
• [ ] Optim usage: This should be covered by the "other package", and not in LineSearches.

from #59

[anriseth]

~I think the Counter part is covered by https://github.com/JuliaNLSolvers/Optim.jl/blob/ac1ab5c9799d29cef8f57ddab54696a1ea318779/test/general/counter.jl~

Oh, forget it. The Optim tests are only checking a subset of the line search algorithms.