[gnome-sdk-images] Upgrade to WebKitGTK+ 2.19.6

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 3fe4aea41f2a1369afabe0d7ab9febac52b33bc7
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Wed Jan 17 07:38:56 2018 -0600

    Upgrade to WebKitGTK+ 2.19.6
    
    Please don't break!

 org.gnome.Sdk.json.in             |    8 +---
 webkitgtk-fix-jsc-api-crash.patch |   69 -------------------------------------
 2 files changed, 2 insertions(+), 75 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index 6d492fa..8f12d30 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -798,12 +798,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://webkitgtk.org/releases/webkitgtk-2.19.5.tar.xz";,
-                    "sha256": "5dc3379079a2c12e356fa979adf799970eb9ff385ba75c4358728242b3c5a5e0"
-                },
-                {
-                    "type": "patch",
-                    "path": "webkitgtk-fix-jsc-api-crash.patch"
+                    "url": "https://webkitgtk.org/releases/webkitgtk-2.19.6.tar.xz";,
+                    "sha256": "c97c87a0db3814f97812edeadc79c330affa51eb43dadbdc7a764b01db38d82b"
                 }
             ]
         },