all: remove license from files

CMakeLists.txt

benchmark/CMakeLists.txt

benchmark/timings-cg.cpp

benchmark/timings-cholesky.cpp

benchmark/timings-derivatives.cpp

benchmark/timings-eigen.cpp

benchmark/timings-geometry.cpp

benchmark/timings.cpp

bindings/python/CMakeLists.txt

bindings/python/algorithm/algorithms.hpp

bindings/python/algorithm/expose-aba-derivatives.cpp

bindings/python/algorithm/expose-aba.cpp

bindings/python/algorithm/expose-algorithms.cpp

bindings/python/algorithm/expose-cat.cpp

bindings/python/algorithm/expose-centroidal.cpp

bindings/python/algorithm/expose-com.cpp

bindings/python/algorithm/expose-crba.cpp

bindings/python/algorithm/expose-dynamics.cpp

bindings/python/algorithm/expose-energy.cpp

bindings/python/algorithm/expose-frames.cpp