remove unused methods

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27137 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
save show/hide grid/axes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27138 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e