Removed other examples in src

src/CMakeLists.txt

src/example_cahnhilliard/2p_driver.hh

src/example_cahnhilliard/3p_driver.hh

src/example_cahnhilliard/CMakeLists.txt

src/example_cahnhilliard/ch2p.ini

src/example_cahnhilliard/ch2p_equation.cc

src/example_cahnhilliard/ch3p.ini

src/example_cahnhilliard/ch3p_equation.cc

src/example_cahnhilliard/grids/periodic.dgf

src/example_cahnhilliard/grids/xperiodic.dgf

src/example_nucleus/3p_driver.hh

src/example_nucleus/CMakeLists.txt

src/example_nucleus/chns.ini

src/example_nucleus/grids/channel_periodic.msh

src/example_nucleus/grids/rectangle_periodic.msh

src/example_nucleus/grids/rectangle_periodic_coarse.msh

src/example_nucleus/grids/square_periodic.msh

src/example_nucleus/nucleus_equation.cc

src/paper_epsdelta/3p_driver.hh

src/paper_epsdelta/CMakeLists.txt