[gimp] build: bump nightly flatpak manifest to GNOME 3.32 runtime.

[Jehan <jehanp src gnome org>]

commit 3db167083afdf7dd69e5f712a1970d9f3198f90b
Author: Jehan <jehan girinstud io>
Date:   Thu Apr 25 21:32:41 2019 +0900

    build: bump nightly flatpak manifest to GNOME 3.32 runtime.
    
    Following today's update from the stable manifest at flathub.

 build/flatpak/org.gimp.GIMP-nightly.json | 30 +-----------------------------
 1 file changed, 1 insertion(+), 29 deletions(-)
---
diff --git a/build/flatpak/org.gimp.GIMP-nightly.json b/build/flatpak/org.gimp.GIMP-nightly.json
index 053c42c17a..9f3438dd12 100644
--- a/build/flatpak/org.gimp.GIMP-nightly.json
+++ b/build/flatpak/org.gimp.GIMP-nightly.json
@@ -2,7 +2,7 @@
     "app-id": "org.gimp.GIMP",
     "branch": "master",
     "runtime": "org.gnome.Platform",
-    "runtime-version": "3.30",
+    "runtime-version": "3.32",
     "sdk": "org.gnome.Sdk",
     "command": "gimp-2.99",
     "separate-locales": false,
@@ -81,34 +81,6 @@
                 }
             ]
         },
-        {
-            "name": "libraw",
-            "config-opts": [ "--disable-static" ],
-            "cleanup": [ "/bin", "/share/doc" ],
-            "sources": [
-                {
-                    "type": "archive",
-                    "url": "http://www.libraw.org/data/LibRaw-0.19.0.tar.gz";,
-                    "sha256": "e83f51e83b19f9ba6b8bd144475fc12edf2d7b3b930d8d280bdebd8a8f3ed259"
-                }
-            ]
-        },
-        {
-            /* This is a GIMP direct dependency, but also for poppler. So make sure
-             * we build this before poppler.
-             */
-            "name": "openjpeg",
-            "buildsystem": "cmake-ninja",
-            "builddir": true,
-            "cleanup": [ "/bin", "/lib/openjpeg-2.3" ],
-            "sources": [
-                {
-                    "type": "archive",
-                    "url": "https://github.com/uclouvain/openjpeg/archive/v2.3.1.tar.gz";,
-                    "sha256": "63f5a4713ecafc86de51bfad89cc07bb788e9bba24ebbf0c4ca637621aadb6a9"
-                }
-            ]
-        },
         {
             "name": "poppler",
             "modules": [