[gnome-build-meta] sdk/vala: use the new --disable-valadoc option instead of a patch

[Abderrahim Kitouni <akitouni src gnome org>]

commit b0cc15cbc7963908a9d07dedf4a7da87a7087a89
Author: Abderrahim Kitouni <akitouni gnome org>
Date:   Tue Oct 9 22:17:31 2018 +0100

    sdk/vala: use the new --disable-valadoc option instead of a patch

 elements/sdk/vala.bst                              |   4 +-
 ...c-Allow-disabling-the-graphviz-dependency.patch | 214 ---------------------
 2 files changed, 1 insertion(+), 217 deletions(-)
---
diff --git a/elements/sdk/vala.bst b/elements/sdk/vala.bst
index aa07266..d687504 100644
--- a/elements/sdk/vala.bst
+++ b/elements/sdk/vala.bst
@@ -3,8 +3,6 @@ sources:
 - kind: git
   url: gitlab_gnome_org:GNOME/vala
   track: master
-- kind: patch
-  path: files/vala/libvaladoc-Allow-disabling-the-graphviz-dependency.patch
 depends:
 - sdk/glib.bst
 - filename: sdk/vala-tarball.bst
@@ -16,4 +14,4 @@ depends:
   junction: freedesktop-sdk.bst
   type: runtime
 variables:
-  conf-local: --enable-unversioned --disable-graphviz
+  conf-local: --enable-unversioned --disable-valadoc