Remove App Engine build/environment scripts (#2870)

It's been over half a year now since we last used any of these and we definitely
no longer have any intentions of ever using App Engine again.

BUG= http://b/457471639

release/cloudbuild-deploy.yaml

@@ -1,97 +0,0 @@
-# To manually trigger a build on GCB, run:
-# gcloud builds submit --config=cloudbuild-deploy.yaml \
-# --substitutions=TAG_NAME=[TAG],_ENV=[ENV] ..
-#
-# To trigger a build automatically, follow the instructions below and add a trigger:
-# https://cloud.google.com/cloud-build/docs/running-builds/automate-builds
-#
-# Note: to work around issue in Spinnaker's 'Deployment Manifest' stage,
-# variable references must avoid the ${var} format. Valid formats include
-# $var or ${"${var}"}. This file uses the former. Since TAG_NAME and _ENV are
-# expanded in the copies sent to Spinnaker, we preserve the brackets around
-# them for safe pattern matching during release.
-# See https://github.com/spinnaker/spinnaker/issues/3028 for more information.
-steps:
-# Pull the credential for nomulus tool.
-- name: 'gcr.io/$PROJECT_ID/builder:latest'
-  entrypoint: /bin/bash
-  args:
-  - -c
-  - |
-    set -e
-    gcloud secrets versions access latest \
-      --secret nomulus-tool-cloudbuild-credential > tool-credential.json
-# Create/Update cloud scheduler and cloud tasks based on a cloud-scheduler-tasks.xml
-- name: 'gcr.io/$PROJECT_ID/builder:latest'
-  entrypoint: /bin/bash
-  args:
-  - -c
-  - |
-    set -e
-    gcloud auth activate-service-account --key-file=tool-credential.json
-    if [ ${_ENV} == production ]; then
-      project_id="domain-registry"
-    else
-      project_id="domain-registry-${_ENV}"
-    fi
-    gcloud storage cp gs://$PROJECT_ID-deploy/${TAG_NAME}/nomulus-config-${_ENV}.yaml .
-    gcloud storage cp gs://$PROJECT_ID-deploy/${TAG_NAME}/cloud-scheduler-tasks-${_ENV}.xml .
-    gcloud storage cp gs://$PROJECT_ID-deploy/${TAG_NAME}/cloud-tasks-queue.xml .
-    deployCloudSchedulerAndQueue nomulus-config-${_ENV}.yaml cloud-scheduler-tasks-${_ENV}.xml $project_id
-    deployCloudSchedulerAndQueue nomulus-config-${_ENV}.yaml cloud-tasks-queue.xml $project_id
-# Deploy the GAE config files.
-# First authorize the gcloud tool to use the credential json file, then
-# download and unzip the tarball that contains the relevant config files
-- name: 'gcr.io/$PROJECT_ID/builder:latest'
-  entrypoint: /bin/bash
-  args:
-  - -c
-  - |
-    set -e
-    gcloud auth activate-service-account --key-file=tool-credential.json
-    if [ ${_ENV} == production ]; then
-      project_id="domain-registry"
-    else
-      project_id="domain-registry-${_ENV}"
-    fi
-    gcloud storage cp gs://$PROJECT_ID-deploy/${TAG_NAME}/${_ENV}.tar .
-    tar -xvf ${_ENV}.tar
-    unzip default/WEB-INF/lib/core.jar
-    gcloud -q --project $project_id app deploy default/WEB-INF/appengine-generated/dispatch.yaml
-# Save the deployed tag for the current environment on GCS, and update the
-# mappings from Nomulus releases to Appengine versions.
-- name: 'gcr.io/$PROJECT_ID/builder:latest'
-  entrypoint: /bin/bash
-  args:
-  - -c
-  - |
-    set -e
-    echo ${TAG_NAME} | \
-      gcloud storage cp - gs://$PROJECT_ID-deployed-tags/nomulus.${_ENV}.tag
-    # Update the release to AppEngine version mapping.
-    if [ ${_ENV} == production ]; then
-      project_id="domain-registry"
-    else
-      project_id="domain-registry-${_ENV}"
-    fi
-    local_map="nomulus.${_ENV}.tmp"
-    gcloud app versions list \
-      --project $project_id --hide-no-traffic \
-      --format="csv[no-heading](SERVICE,VERSION.ID)" | \
-      grep -e "^backend\|^default\|^bsa\|^pubapi\|^tools" |\
-      while read line; do echo "${TAG_NAME},$line"; done | tee "$local_map"
-    num_versions=$(cat "$local_map" | wc -l)
-    if [ "$num_versions" -ne 5 ]; then
-      echo "Expecting exactly five active services. Found $num_versions"
-      exit 1
-    fi
-    gcloud storage cp "$local_map" gs://$PROJECT_ID-deployed-tags/nomulus.${_ENV}.tmp
-    # Atomically append uploaded tmp file to nomulus.${_ENV}.versions
-    gcloud storage objects compose \
-      gs://$PROJECT_ID-deployed-tags/nomulus.${_ENV}.versions \
-      gs://$PROJECT_ID-deployed-tags/nomulus.${_ENV}.tmp \
-      gs://$PROJECT_ID-deployed-tags/nomulus.${_ENV}.versions
-
-timeout: 3600s
-options:
-  machineType: 'E2_HIGHCPU_32'