Revert "Update stackage and add diagrams-gtk dependency."

This reverts commit d0a1a5944f.

glance.cabal

@@ -70,7 +70,6 @@ executable glance-gui
                      , gi-gtk
                      , gi-gtk-declarative
                      , gi-gtk-declarative-app-simple
-                     , diagrams-gtk
                      , text
                      , pipes
                      , pipes-extras

stack.yaml

@@ -1,7 +1,7 @@
 # For more information, see: https://github.com/commercialhaskell/stack/blob/release/doc/yaml_configuration.md
 
 # Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
-resolver: lts-16.2
+resolver: lts-15.13
 
 # Local packages, usually specified by relative directory name
 packages:
@@ -12,15 +12,6 @@ extra-deps: [
 "diagrams-graphviz-1.4.1.1"
 , "gi-gtk-declarative-0.6.3"
 , "gi-gtk-declarative-app-simple-0.6.3"
-, "diagrams-gtk-1.4"
-, "cairo-0.13.8.0"
-, "diagrams-cairo-1.4.1.1"
-, "gtk-0.15.4"
-, "gio-0.13.8.1@sha256:7404841eefdfffb50c2b5f63879ffe4bf40fb5ddf90a7f633494eca0e23150a5,3136"
-, "glib-0.13.8.1@sha256:42670daf0c85309281e08ba8559df75daa2e3be642e79fdfa781bef5e59658b0,3156"
-, "gtk2hs-buildtools-0.13.8.0@sha256:132f38155fc677430a47ea750918973161c876fb6f281d342ac2f07eb99229ce,5238"
-, "pango-0.13.8.1@sha256:877b121c0bf87c96d3619effae6751ecfd74b7f7f3227cf3fde012597aed5ed9,3917"
-
 ]
 
 # Override default flag values for local packages and extra-deps