use non-CAS derivatives for tangents (and other places where the display form is not important)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32099 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
remove empty folders

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32100 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
remove unused package (bric)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32101 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e