Remove `dhall-text` from Stackage
Remove `dhall-text` from Stackage

The `dhall-text` package is deprecated now, superseded by the
`dhall text` subcommand provided by the `dhall` package
fimad/stackage,Daniel-Diaz/stackage,clinty/stackage,asr/stackage,simonmichael/stackage,athanclark/stackage,massysett/stackage,iand675/stackage,stackbuilders/stackage,michalkonecny/stackage,wereHamster/stackage,jonschoning/stackage,fpco/stackage,spencerjanssen/stackage,mrkkrp/stackage,soenkehahn/stackage