Remove ContentBlock from separated installation

Change-Id: Iee2740e7eac3e5c74411d456d195ca7c8a8eebdb
diff --git a/Dockerfile b/Dockerfile
index 44003e2..1e88cee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -43,8 +43,7 @@
             curl && \
     set -o pipefail && \
     curl -L https://cpanmin.us | perl - App::cpanminus && \
-    cpanm git://github.com/Akron/Mojolicious-Plugin-Localize.git \
-          git://github.com/Akron/Mojolicious-Plugin-TagHelpers-ContentBlock.git && \
+    cpanm git://github.com/Akron/Mojolicious-Plugin-Localize.git && \
     cpanm Cpanel::JSON::XS \
           EV \
           IO::Socket::Socks && \