Bug 1625337 - Do not use signing transform on beetmover-repackage. r=clokep

There's no need to check for unsupported signature formats in this job. They
will have been removed by the signing tasks already.
Leaving it in removes the language packs from upstreamArtifacts so the
Beetmover service does not know how to find those files to copy to the archive
server.

--HG--
extra : rebase_source : cb9d211b96195b5d485796e4d655c7adcdc856b3

taskcluster/ci/beetmover-repackage/kind.yml

@@ -11,7 +11,6 @@ transforms:
     - taskgraph.transforms.beetmover_repackage_l10n:transforms
     - taskgraph.transforms.beetmover_repackage:transforms
     - taskgraph.transforms.task:transforms
-    - comm_taskgraph.transforms.signing:transforms
 
 kind-dependencies:
     - build