Remove remaining multiple clusters

Since multiple clusters moving to core, we can remove any remaining
references to has_multiple_clusters, as discussed in the comments of the
parent MR.

app/helpers/clusters_helper.rb

 # frozen_string_literal: true
 
 module ClustersHelper
-  def has_multiple_clusters?
-    true
-  end
-
   def create_new_cluster_label(provider: nil)
     case provider
     when 'aws'

app/views/clusters/clusters/_gitlab_integration_form.html.haml

@@ -10,17 +10,10 @@
 
   .form-group
     %h5= s_('ClusterIntegration|Environment scope')
-    - if has_multiple_clusters?
     = field.text_field :environment_scope, class: 'col-md-6 form-control js-select-on-focus', placeholder: s_('ClusterIntegration|Environment scope')
-      .form-text.text-muted= s_("ClusterIntegration|Choose which of your environments will use this cluster.")
-    - else
-      = text_field_tag :environment_scope, '*', class: 'col-md-6 form-control disabled', placeholder: s_('ClusterIntegration|Environment scope'), disabled: true
     - environment_scope_url = help_page_path('user/project/clusters/index', anchor: 'base-domain')
     - environment_scope_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: environment_scope_url }
-      .form-text.text-muted
-        %code
-          = _('*')
-        = s_("ClusterIntegration| is the default environment scope for this cluster. This means that all jobs, regardless of their environment, will use this cluster. %{environment_scope_start}More information%{environment_scope_end}").html_safe % { environment_scope_start: environment_scope_start, environment_scope_end: '</a>'.html_safe }
+    .form-text.text-muted= s_("ClusterIntegration|Choose which of your environments will use this cluster. %{environment_scope_start}More information%{environment_scope_end}").html_safe % { environment_scope_start: environment_scope_start, environment_scope_end: '</a>'.html_safe }
 
   .form-group
     %h5= s_('ClusterIntegration|Base domain')

app/views/clusters/clusters/gcp/_form.html.haml

@@ -16,7 +16,6 @@
   data: { token: token_in_session } }, url: clusterable.create_gcp_clusters_path, as: :cluster do |field|
   = field.text_field :name, required: true, title: s_('ClusterIntegration|Cluster name is required.'),
     label: s_('ClusterIntegration|Kubernetes cluster name'), label_class: 'label-bold'
-  - if has_multiple_clusters?
   = field.form_group :environment_scope, label: { text: s_('ClusterIntegration|Environment scope'),
     class: 'label-bold' } do
     = field.text_field :environment_scope, required: true, class: 'form-control',

app/views/clusters/clusters/user/_form.html.haml

@@ -13,10 +13,10 @@
   url: clusterable.create_user_clusters_path, as: :cluster do |field|
   = field.text_field :name, required: true, title: s_('ClusterIntegration|Cluster name is required.'),
     label: s_('ClusterIntegration|Kubernetes cluster name'), label_class: 'label-bold'
-  - if has_multiple_clusters?
-    = field.text_field :environment_scope, required: true, title: 'Environment scope is required.',
+
+  = field.text_field :environment_scope, required: true, title: s_('ClusterIntegration|Environment scope is required.'),
     label: s_('ClusterIntegration|Environment scope'), label_class: 'label-bold',
-      help: s_("ClusterIntegration|Choose which of your environments will use this cluster.")
+    help: s_('ClusterIntegration|Choose which of your environments will use this cluster.')
 
   = field.fields_for :platform_kubernetes, @user_cluster.platform_kubernetes do |platform_kubernetes_field|
     = platform_kubernetes_field.url_field :api_url, required: true,

locale/gitlab.pot

@@ -791,9 +791,6 @@ msgstr ""
 msgid "(revoked)"
 msgstr ""
 
-msgid "*"
-msgstr ""
-
 msgid "+ %{amount} more"
 msgstr ""
 
@@ -4950,9 +4947,6 @@ msgstr ""
 msgid "ClusterIntegration| can be used instead of a custom domain."
 msgstr ""
 
-msgid "ClusterIntegration| is the default environment scope for this cluster. This means that all jobs, regardless of their environment, will use this cluster. %{environment_scope_start}More information%{environment_scope_end}"
-msgstr ""
-
 msgid "ClusterIntegration|%{appList} was successfully installed on your Kubernetes cluster"
 msgstr ""
 
@@ -5073,6 +5067,9 @@ msgstr ""
 msgid "ClusterIntegration|Choose which of your environments will use this cluster."
 msgstr ""
 
+msgid "ClusterIntegration|Choose which of your environments will use this cluster. %{environment_scope_start}More information%{environment_scope_end}"
+msgstr ""
+
 msgid "ClusterIntegration|Clear cluster cache"
 msgstr ""
 
@@ -5205,6 +5202,9 @@ msgstr ""
 msgid "ClusterIntegration|Environment scope"
 msgstr ""
 
+msgid "ClusterIntegration|Environment scope is required."
+msgstr ""
+
 msgid "ClusterIntegration|Every new Google Cloud Platform (GCP) account receives $300 in credit upon %{sign_up_link}. In partnership with Google, GitLab is able to offer an additional $200 for both new and existing GCP accounts to get started with GitLab's Google Kubernetes Engine Integration."
 msgstr ""
 

spec/helpers/clusters_helper_spec.rb

@@ -107,12 +107,6 @@ RSpec.describe ClustersHelper do
     end
   end
 
-  describe '#has_multiple_clusters?' do
-    subject { helper.has_multiple_clusters? }
-
-    it { is_expected.to be_truthy }
-  end
-
   describe '#cluster_type_label' do
     subject { helper.cluster_type_label(cluster_type) }