[gnome-sdk-images] Use librsvg from Freedesktop SDK

[Jordan Petridis <jpetridis src gnome org>]

commit abbc72bcf40459f0469274106a94fbf842dbf170
Author: Jordan Petridis <jpetridis gnome org>
Date:   Sun Sep 9 00:13:21 2018 +0300

    Use librsvg from Freedesktop SDK
    
    We are already sticking with a stable branch of librsvg, since
    it can't be built from git in an easy way. It makes more sense
    to use the **supported** librsvg that is shipped with
    Freedesktop SDK. 2.40 branch has long been EOL, where FDO is
    already on 2.44.

 org.gnome.Sdk.json.in | 12 ------------
 1 file changed, 12 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index c3d6a61..fd7444a 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -398,18 +398,6 @@
                 }
             ]
         },
-        {
-            "name": "librsvg",
-            "config-opts": ["--disable-static", "--enable-vala"],
-            "ensure-writable": ["/lib/*/gdk-pixbuf-2.0/*/loaders.cache"],
-            "sources": [
-                {
-                    "type": "git",
-                    "url": "https://gitlab.gnome.org/GNOME/librsvg.git";,
-                    "branch": "librsvg-2-40"
-                }
-            ]
-        },
         {
             "name": "gtk2",
             "config-opts": ["--disable-man",