Delete code related to the no longer supported MKS remote consoles

https://bugzilla.redhat.com/show_bug.cgi?id=1532720

app/models/manageiq/providers/vmware/infra_manager.rb

@@ -418,11 +418,6 @@ def vm_remove_disk_by_file(vm, options = {})
     end
     alias vm_remove_disk vm_remove_disk_by_file
 
-    def vm_acquire_mks_ticket(vm, options = {})
-      invoke_vim_ws(:acquireMksTicket, vm, options[:user_event])
-    end
-    alias_method :vm_remote_console_mks_acquire_ticket, :vm_acquire_mks_ticket
-
     def vm_acquire_ticket(vm, options = {})
       invoke_vim_ws(:acquireTicket, vm, options[:user_event], options[:ticket_type])
     end

app/models/manageiq/providers/vmware/infra_manager/vm/remote_console.rb

@@ -2,7 +2,7 @@ module ManageIQ::Providers::Vmware::InfraManager::Vm::RemoteConsole
   require_dependency 'securerandom'
 
   def console_supported?(type)
-    %w(VMRC VNC MKS WEBMKS).include?(type.upcase)
+    %w(VMRC VNC WEBMKS).include?(type.upcase)
   end
 
   def validate_remote_console_acquire_ticket(protocol, options = {})
@@ -37,15 +37,6 @@ def remote_console_acquire_ticket_queue(protocol, userid)
     MiqTask.generic_action_with_callback(task_opts, queue_opts)
   end
 
-  #
-  # MKS
-  #
-
-  def remote_console_mks_acquire_ticket(_userid = nil, _originating_server = nil)
-    validate_remote_console_acquire_ticket("mks", :check_if_running => false)
-    ext_management_system.vm_remote_console_mks_acquire_ticket(self)
-  end
-
   #
   # VMRC
   #

spec/models/manageiq/providers/vmware/infra_manager/vm/remote_console_spec.rb

@@ -10,11 +10,6 @@
   let(:vm) { FactoryBot.create(:vm_with_ref, :ext_management_system => ems) }
 
   context '#remote_console_acquire_ticket' do
-    it 'with :mks' do
-      expect(vm).to receive(:remote_console_mks_acquire_ticket).with(user.userid, 1)
-      vm.remote_console_acquire_ticket(user.userid, 1, :mks)
-    end
-
     it 'with :webmks' do
       expect(vm).to receive(:remote_console_webmks_acquire_ticket).with(user.userid, 1)
       vm.remote_console_acquire_ticket(user.userid, 1, :webmks)
@@ -41,15 +36,6 @@
       allow(MiqServer).to receive_messages(:my_server => server)
     end
 
-    it 'with :mks' do
-      vm.remote_console_acquire_ticket_queue(:mks, user.userid)
-
-      q_all = MiqQueue.all
-      expect(q_all.length).to eq(1)
-      expect(q_all[0].method_name).to eq('remote_console_acquire_ticket')
-      expect(q_all[0].args).to eq([user.userid, 1, :mks])
-    end
-
     it 'with :webmks' do
       vm.remote_console_acquire_ticket_queue(:webmks, user.userid)