Forgotten commit for removing extra (unused) giac files


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27328 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Trying to implement #3511 in trunk (untested)


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27329 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e