This disables the asmjs builder for beta

This builder is just a test builder, so the artifacts we produce
should be unaffected. Unfortunately, the mozilla-games S3 bucket appears
to have gone offline or at least is giving us forbidden errors, so the
asmjs builder isn't able to build anymore.

Author: Mark-Simulacrum

src/ci/azure-pipelines/auto.yml

@@ -124,8 +124,6 @@ jobs:
         IMAGE: dist-x86_64-netbsd
         DEPLOY: 1
 
-      asmjs:
-        IMAGE: asmjs
       i686-gnu:
         IMAGE: i686-gnu
       i686-gnu-nopt: