Remove documentation about how to publish packages (#1581)

Author: mrodm

docs/howto/use_package_storage_v2.md

@@ -41,57 +41,3 @@ We identified a few issues in v1 design, we couldn't easily overcome or patch:
 4. Enable validation for incoming packages (spec and signatures).
 5. Support package signatures. It wasn't possible to calculate the signature for unarchived package directories.
 
-## What should a package owner do to automatically publish their packages?
-
-### Existing packages
-
-Package revisions already deployed in the production Package Storage (present in the `production` branch of the [package-storage](https://github.com/elastic/package-storage))
-are automatically synced with the new storage. In this case we disable the validation as some older packages will not be able
-to pass current spec requirements.
-
-Sync between v1 and v2 will be enabled until we officially deprecate the v1 storage (no more PRs or promotions).
-
-### Next revisions
-
-Before we deprecate the v1 storage, package owners will have to adjust their releasing pipelines to submit packages
-to the new destination. Every package candidate should be submitted together with a corresponding signature, generated
-using the [Elastic signing pipeline](https://internal-ci.elastic.co/job/elastic+unified-release+master+sign-artifacts-with-gpg/).
-
-Here is the list of requirements and code modifications based on the `beats-ci`.
-
-#### Requirements
-
-1. CI job signing credentials (`sign-artifacts-with-gpg-job`) - use them to call the signing pipeline on
-   the `internal-ci` Jenkins instance. The pipeline will sign artifacts uploaded to the signing bucket and upload there their signatures.
-2. Signing bucket credentials (`internal-ci-gcs-plugin`) - use them to upload zipped packages to be signed
-   and download matching signatures.
-3. Package Storage GCP uploader credentials (`upload-package-to-package-storage`) - use them to upload a package candidate to the "queue" bucket.
-   The candidates will be picked by the publishing job and removed after processing.
-4. Package Storage uploader secret (`secret/gce/elastic-bekitzur/service-account/package-storage-uploader`) - use it to kick off
-   the publishing job to process the uploaded candidate.
-
-#### Code modifications
-
-These code modifications refer to the Jenkinsfile/groovy files, which will orchestrate the Jenkins worker to sign the package
-and publish it using the Package Storage publishing job.
-
-Function [packageStoragePublish(...)](https://github.com/elastic/elastic-package/blob/f8f678d20b9b60d438188e8dfd2fb4e7519b5a69/.ci/package-storage-publish.groovy#L70)
-
-##### Sign the package candidate
-
-Function [signUnpublishedArtifactsWithElastic(...)](https://github.com/elastic/elastic-package/blob/f8f678d20b9b60d438188e8dfd2fb4e7519b5a69/.ci/package-storage-publish.groovy#L87-L122).
-
-1. Check if the package has been already published (HTTP request to EPR).
-2. Upload the package candidate to the signing bucket.
-3. Call the Elastic signing pipeline to create matching signatures. The pipeline signs them using the Elastic private key.
-4. Once the job succeeded, download package signatures.
-
-##### Publish the package candidate
-
-Function [uploadUnpublishedToPackageStorage(...)](https://github.com/elastic/elastic-package/blob/f8f678d20b9b60d438188e8dfd2fb4e7519b5a69/.ci/package-storage-publish.groovy#L124-L151).
-
-1. Check if the package has been already published (HTTP request to EPR).
-2. Upload the package candidate to the special "queue" bucket - `elastic-bekitzur-package-storage-internal`.
-3. Call the [publishing job](https://internal-ci.elastic.co/job/package_storage/job/publishing-job-remote/). The publishing jobs verifies
-   correctness of the package format and corresponding signature. Next, the job extracts static resources, uploads the zipped package
-   to the public bucket, and schedules indexing in background.