[librsvg-oci-images] Rustc: remove vala dep

[Jordan Petridis <jpetridis src gnome org>]

commit a9c193f22bf5ba582bdda3357c5f23a733cedd6e
Author: Jordan Petridis <jpetridis gnome org>
Date:   Sun Sep 2 16:57:04 2018 +0300

    Rustc: remove vala dep

 rustc/rustc_template | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/rustc/rustc_template b/rustc/rustc_template
index f27f218..4895474 100644
--- a/rustc/rustc_template
+++ b/rustc/rustc_template
@@ -3,7 +3,7 @@ FROM debian:testing-slim
 # Librsvg deps
 RUN apt update -yqq && apt upgrade -yqq && \
     apt install -yqq --no-install-recommends \
-    gcc make vala curl \
+    gcc make curl \
     automake autoconf libtool gettext itstool \
     libgdk-pixbuf2.0-dev libgirepository1.0-dev \
     gtk-doc-tools git libgtk-3-dev libxml2-dev \