Remove Minkube config.

We do not have the bandwidth to keep the Minikube deployment up-to-date,
so rather than leave half-baked config in the repo we'll remove it for
now. Complications that would have to be resolved for running Minikube
locally include managing secrets out of Azure Key Vault and managing TLS
termination over localhost.

The Synack audit also identified the Minikube basic auth password as an
issue; it's only for demo purposes, but this will resolve that ticket.

script/minikube_setup

@@ -1,33 +0,0 @@
-#!/bin/bash
-
-# script/minikube_setup: Set up local AT-AT cluster on Minikube
-
-source "$(dirname "${0}")"/../script/include/global_header.inc.sh
-
-output_divider "Start Minikube"
-minikube start
-
-output_divider "Use Minikube Docker environment"
-eval $(minikube docker-env)
-
-output_divider "Build AT-AT Docker image for Minikube registry"
-docker build . -t atat:latest
-
-output_divider "Pull images for AT-AT cluster"
-docker pull redis:5.0-alpine
-docker pull postgres:11-alpine
-docker pull nginx:alpine
-
-output_divider "Apply AT-AT Kubernetes config to Minikube cluster"
-kubectl --context=minikube create namespace atat
-kubectl --context=minikube apply -f deploy/minikube/
-
-output_divider "Create database and apply migrations"
-# wait for the datastore deployment to become available
-kubectl --context=minikube -n atat wait --for=condition=Available deployment/datastores
-# postgres isn't necessarily running as soon as the pod is available, so wait a few
-sleep 3
-DB_POD=$(kubectl --context=minikube -n atat get pods -l app=db-cache -o custom-columns=NAME:.metadata.name --no-headers | sed -n 1p)
-ATST_POD=$(kubectl --context=minikube -n atat get pods -l app=atst -o custom-columns=NAME:.metadata.name --no-headers | sed -n 1p)
-kubectl --context=minikube -n atat exec -it $DB_POD -c postgres -- createdb -U postgres atat
-kubectl --context=minikube -n atat exec -it $ATST_POD -c atst -- .venv/bin/python .venv/bin/alembic upgrade head