Removed tests.

AMDiS/test/demo_test/CMakeLists.txt

AMDiS/test/demo_test/init/ball.dat.2d

AMDiS/test/demo_test/init/ball.dat.3d

AMDiS/test/demo_test/init/bunny.init

AMDiS/test/demo_test/init/couple.dat.2d

AMDiS/test/demo_test/init/ellipt.dat.1d

AMDiS/test/demo_test/init/ellipt.dat.2d

AMDiS/test/demo_test/init/ellipt.dat.3d

AMDiS/test/demo_test/init/heat.dat.1d

AMDiS/test/demo_test/init/heat.dat.2d

AMDiS/test/demo_test/init/heat.dat.3d

AMDiS/test/demo_test/init/neumann.dat.2d

AMDiS/test/demo_test/init/parallelellipt.dat.2d

AMDiS/test/demo_test/init/parallelheat.dat.2d

AMDiS/test/demo_test/init/parallelvecellipt.dat.2d

AMDiS/test/demo_test/init/parametric.dat.3d

AMDiS/test/demo_test/init/periodic.dat.1d

AMDiS/test/demo_test/init/periodic.dat.2d

AMDiS/test/demo_test/init/periodic.dat.3d

AMDiS/test/demo_test/init/periodic.per.1d