Revert "image-diff fix for javascript dependencies"

This reverts commit 85336a7be93b797a72e918a0b323e5be677ce547.

Reason for revert: Doesn't work. I think this requires doing in "job".

Change-Id: I729f62691e9f63d5a4f32b8ff8ac50f848f87958

zuul.d/projects.yaml

diff --git a/zuul.d/projects.yaml b/zuul.d/projects.yaml
index 9c7584c..7205947 100644
--- a/zuul.d/projects.yaml
+++ b/zuul.d/projects.yaml
@@ -174,9 +174,6 @@
 
 - project:
     name: plugins/image-diff
-    vars:
-      bazelisk_artifacts:
-        - "bazel-bin/plugins/{{ gerrit_plugin }}/{{ gerrit_plugin }}.js"
     templates:
       - non-core-plugin