Remove Makefile part specific for go1.1
Remove Makefile part specific for go1.1

sobczyk/aptly,adfinis-forks/aptly,vincentbernat/aptly,neolynx/aptly,aptly-dev/aptly,scalp42/aptly,sobczyk/aptly,smira/aptly,gearmover/aptly,ceocoder/aptly,bankonme/aptly,bankonme/aptly,scalp42/aptly,bsundsrud/aptly,smira/aptly,neolynx/aptly,ceocoder/aptly,sobczyk/aptly,gearmover/aptly,jola5/aptly,bsundsrud/aptly,adfinis-forks/aptly,vincentbernat/aptly,gdbdzgd/aptly,aptly-dev/aptly,vincentbernat/aptly,seaninspace/aptly,aptly-dev/aptly,scalp42/aptly,seaninspace/aptly,bsundsrud/aptly,seaninspace/aptly,adfinis-forks/aptly,smira/aptly,gdbdzgd/aptly,jola5/aptly,neolynx/aptly,ceocoder/aptly,bankonme/aptly,gearmover/aptly,jola5/aptly,gdbdzgd/aptly