go/ssa/interp/testdata: remove comment about now-fixed go/types bug
go/ssa/interp/testdata: remove comment about now-fixed go/types bug

Change-Id: I55372a40c0049368a74247fe1819be384313f838
Reviewed-on: https://go-review.googlesource.com/7666
Reviewed-by: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>

dmitris/tools,golang/tools,nicot/tools,magiccao/tools,argandas/tools,dmitris/tools,syreclabs/go-tools,argandas/tools,cmars/tools,cmars/tools,jdhenke/tools,glasser/golang-tools,argandas/tools,cmars/tools,springning/tools,josharian/tools,runcom/tools,cw2018/tools,runcom/tools,golang/tools,nicot/tools,syreclabs/go-tools,cw2018/tools,syreclabs/go-tools,glasser/golang-tools,golang/tools,sshetty10/tools,magiccao/tools,runcom/tools,jdhenke/tools,matryer/tools,sshetty10/tools,josharian/tools,syreclabs/go-tools,dmitris/tools,nicot/tools,sshetty10/tools,jdhenke/tools,magiccao/tools,sshetty10/tools,josharian/tools,cw2018/tools,matryer/tools,argandas/tools,glasser/golang-tools,magiccao/tools,syreclabs/go-tools,golang/tools,glasser/golang-tools,runcom/tools,matryer/tools,cmars/tools,springning/tools,josharian/tools,syreclabs/go-tools,nicot/tools,matryer/tools,golang/tools,springning/tools,cw2018/tools,dmitris/tools,jdhenke/tools,springning/tools