CMakeLists.txt: removed libtnl.so (TNL is now header-only!)

src/Benchmarks/BLAS/CMakeLists.txt

src/Benchmarks/DistSpMV/CMakeLists.txt

src/Benchmarks/HeatEquation/CMakeLists.txt

src/Benchmarks/LinearSolvers/CMakeLists.txt

src/Benchmarks/SpMV/CMakeLists.txt

src/Examples/CMakeLists.txt

src/Examples/flow-sw/CMakeLists.txt

src/Examples/flow-vl/CMakeLists.txt

src/Examples/flow/CMakeLists.txt

src/Examples/heat-equation/CMakeLists.txt

src/Examples/inviscid-flow-sw/CMakeLists.txt

src/Examples/inviscid-flow-vl/CMakeLists.txt

src/Examples/inviscid-flow/CMakeLists.txt

src/Examples/simple-examples/CMakeLists.txt

src/Examples/transport-equation/CMakeLists.txt

src/Python/pytnl/tnl/CMakeLists.txt

src/TNL/CMakeLists.txt

src/TNL/Experimental/Arithmetics/UnitTests/CMakeLists.txt

...al/Hamilton-Jacobi/Solvers/hamilton-jacobi/CMakeLists.txt

src/Tools/CMakeLists.txt