Bug#1043357: golang-github-gotk3-gotk3: Unnecessary build dependency libgio-cil

[Bastian Germann]

Source: golang-github-gotk3-gotk3
Version: 0.6.2-1
Severity: important
golang-github-gotk3-gotk3 build-depends on libgio-cil (C#) which does 
not make any sense. I have built the package successfully without that 
build dependency, so please drop it.