Removed dead code, fixed warnings

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27208 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3487 make sure fixed objects not highlighted on mouseover

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27210 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.183.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27212 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e