remove spreadsheet and sage worksheet and sage slideshow from editor -- they are not used/implemented in any real sense anymore
remove spreadsheet and sage worksheet and sage slideshow from editor -- they are not used/implemented in any real sense anymore

sagemathinc/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc