Remove unused audit events helper methods

These methods were no longer called since we moved from server template
to front-end rendering.

ee/app/helpers/audit_events_helper.rb

@@ -2,40 +2,26 @@
 
 module AuditEventsHelper
   FILTER_TOKEN_TYPES = {
-      user: :user,
-      group: :group,
-      project: :project,
-      member: :member
+    user: :user,
+    group: :group,
+    project: :project,
+    member: :member
   }.freeze
 
   def admin_audit_event_tokens
-    [{ type: FILTER_TOKEN_TYPES[:user] }, { type: FILTER_TOKEN_TYPES[:group] }, { type: FILTER_TOKEN_TYPES[:project] }].freeze
+    [
+      { type: FILTER_TOKEN_TYPES[:user] },
+      { type: FILTER_TOKEN_TYPES[:group] },
+      { type: FILTER_TOKEN_TYPES[:project] }
+    ].freeze
   end
 
   def group_audit_event_tokens(group_id)
-    [{ type: FILTER_TOKEN_TYPES[:member], group_id: group_id }]
+    [{ type: FILTER_TOKEN_TYPES[:member], group_id: group_id }].freeze
   end
 
   def project_audit_event_tokens(project_path)
-    [{ type: FILTER_TOKEN_TYPES[:member], project_path: project_path }]
-  end
-
-  def human_text(details)
-    return details[:custom_message] if details[:custom_message]
-
-    details.map { |key, value| select_keys(key, value) }.join(" ").humanize
-  end
-
-  def select_keys(key, value)
-    if key =~ /^(author|target)_.*/
-      ""
-    elsif key.to_s == 'ip_address' && value.blank?
-      ""
-    elsif key =~ /^expiry_(from|to)$/ && value.blank?
-      "#{key} <strong>never expires</strong>"
-    else
-      "#{key} <strong>#{value}</strong>"
-    end
+    [{ type: FILTER_TOKEN_TYPES[:member], project_path: project_path }].freeze
   end
 
   def export_url

ee/spec/helpers/audit_events_helper_spec.rb

@@ -32,68 +32,6 @@ RSpec.describe AuditEventsHelper do
     end
   end
 
-  describe '#human_text' do
-    let(:target_type) { 'User' }
-    let(:details) do
-      {
-        author_name: 'John Doe',
-        target_id: 1,
-        target_type: target_type,
-        target_details: 'Michael'
-      }
-    end
-
-    subject { human_text(details) }
-
-    context 'when message consist of hash keys' do
-      subject { human_text({ remove: 'user_access' }.merge(details))}
-
-      it 'ignores keys that start with start with author_, or target_' do
-        expect(subject).to eq 'Remove <strong>user access</strong>    '
-      end
-    end
-
-    context 'when details contain custom message' do
-      let(:custom_message) { 'Custom message <strong>with tags</strong>' }
-
-      subject { human_text( { custom_message: custom_message }.merge(details)) }
-
-      it 'returns custom message' do
-        expect(subject).to eq(custom_message)
-      end
-    end
-  end
-
-  describe '#select_keys' do
-    it 'returns empty string if key starts with author_' do
-      expect(select_keys('author_name', 'John Doe')).to eq ''
-    end
-
-    it 'returns empty string if key starts with target_' do
-      expect(select_keys('target_name', 'John Doe')).to eq ''
-    end
-
-    it 'returns empty string if key is ip_address and the value is blank' do
-      expect(select_keys('ip_address', nil)).to eq ''
-    end
-
-    it 'returns formatted text if key is ip_address and the value is not blank' do
-      expect(select_keys('ip_address', '127.0.0.1')).to eq 'ip_address <strong>127.0.0.1</strong>'
-    end
-
-    it 'returns formatted text if key does not start with author_, or target_' do
-      expect(select_keys('remove', 'user_access')).to eq 'remove <strong>user_access</strong>'
-    end
-
-    it 'returns formatted text with `never expires` if key is expiry_from and the value is blank' do
-      expect(select_keys('expiry_from', nil)).to eq 'expiry_from <strong>never expires</strong>'
-    end
-
-    it 'returns formatted text with `never expires` if key is expiry_to and the value is blank' do
-      expect(select_keys('expiry_to', nil)).to eq 'expiry_to <strong>never expires</strong>'
-    end
-  end
-
   describe '#export_url' do
     subject { export_url }