[CI] Remove Windows Server 2019 Runnerset (#499)

This patch removes the windows server 2019 runnerset and the node pool
associated with it now that we have migrated to server 2022.

Planning on landing this after we have given the new runner set a bit of
soak time and the existing runner pods have drained from the node pool.

Author: boomanaiden154

premerge/gke_cluster/main.tf

@@ -97,50 +97,6 @@ resource "google_container_node_pool" "llvm_premerge_libcxx" {
   }
 }
 
-# TODO(boomanaiden154): Make sure to delete this node pool after we have
-# switched over to server 2022.
-resource "google_container_node_pool" "llvm_premerge_windows" {
-  name               = "llvm-premerge-windows"
-  location           = var.region
-  cluster            = google_container_cluster.llvm_premerge.name
-  initial_node_count = 0
-
-  autoscaling {
-    total_min_node_count = 0
-    total_max_node_count = 16
-  }
-
-  # We do not set a taint for the windows nodes as kubernetes by default sets
-  # a node.kubernetes.io/os taint for windows nodes.
-  node_config {
-    machine_type = var.windows_machine_type
-    labels = {
-      "premerge-platform" : "windows"
-    }
-    image_type = "WINDOWS_LTSC_CONTAINERD"
-    # Add a script that runs on the initial boot to disable Windows Defender.
-    # Windows Defender causes an increase in test times by approximately an
-    # order of magnitude.
-    metadata = {
-      "sysprep-specialize-script-ps1" = "Set-MpPreference -DisableRealtimeMonitoring $true"
-      # Terraform wants to recreate the node pool everytime whe running
-      # terraform apply unless we explicitly set this.
-      # TODO(boomanaiden154): Look into why terraform is doing this so we do
-      # not need this hack.
-      "disable-legacy-endpoints" = "true"
-    }
-    disk_size_gb = 200
-    disk_type    = "pd-ssd"
-    # Terraform wants to recreate the node pool everytime whe running
-    # terraform apply unless we explicitly set this.
-    # TODO(boomanaiden154): Look into why terraform is doing this so we do
-    # not need this hack.
-    resource_labels = {
-      "goog-gke-node-pool-provisioning-model" = "on-demand"
-    }
-  }
-}
-
 resource "google_container_node_pool" "llvm_premerge_windows_2022" {
   name               = "llvm-premerge-windows-2022"
   location           = var.region

premerge/premerge_resources/main.tf

@@ -41,12 +41,6 @@ resource "kubernetes_namespace" "llvm_premerge_libcxx_next_runners" {
   }
 }
 
-resource "kubernetes_namespace" "llvm_premerge_windows_runners" {
-  metadata {
-    name = "llvm-premerge-windows-runners"
-  }
-}
-
 resource "kubernetes_namespace" "llvm_premerge_windows_2022_runners" {
   metadata {
     name = "llvm-premerge-windows-2022-runners"
@@ -121,23 +115,6 @@ resource "kubernetes_secret" "libcxx_next_github_pat" {
   depends_on = [kubernetes_namespace.llvm_premerge_libcxx_next_runners]
 }
 
-resource "kubernetes_secret" "windows_github_pat" {
-  metadata {
-    name      = "github-token"
-    namespace = "llvm-premerge-windows-runners"
-  }
-
-  data = {
-    "github_app_id"              = var.github_app_id
-    "github_app_installation_id" = var.github_app_installation_id
-    "github_app_private_key"     = var.github_app_private_key
-  }
-
-  type = "Opaque"
-
-  depends_on = [kubernetes_namespace.llvm_premerge_windows_runners]
-}
-
 resource "kubernetes_secret" "windows_2022_github_pat" {
   metadata {
     name      = "github-token"
@@ -185,24 +162,6 @@ resource "helm_release" "github_actions_runner_set_linux" {
   ]
 }
 
-resource "helm_release" "github_actions_runner_set_windows" {
-  name       = "llvm-premerge-windows-runners"
-  namespace  = "llvm-premerge-windows-runners"
-  repository = "oci://ghcr.io/actions/actions-runner-controller-charts"
-  version    = "0.11.0"
-  chart      = "gha-runner-scale-set"
-
-  values = [
-    "${templatefile("windows_runner_values.yaml", { runner_group_name : var.runner_group_name })}"
-  ]
-
-  depends_on = [
-    kubernetes_namespace.llvm_premerge_windows_runners,
-    kubernetes_secret.windows_github_pat,
-    helm_release.github_actions_runner_controller,
-  ]
-}
-
 resource "helm_release" "github_actions_runner_set_windows_2022" {
   name       = "llvm-premerge-windows-2022-runners"
   namespace  = "llvm-premerge-windows-2022-runners"