Remove command-buffer CTS L0 workaround

The CTS code for command-buffers on the L0 backend has a
workaround that forces batched submission to be used rather
than immediate submission.

However, both batch and immediate submission L0 command-lists are
now supported, so this workaround is no longer required.

Tested by running on PVC which uses immediate command-lists by
default.

test/conformance/exp_command_buffer/fixtures.h

@@ -159,37 +159,17 @@ struct urUpdatableCommandBufferExpExecutionTest
  ASSERT_SUCCESS(urCommandBufferCreateExp(context, device, &desc,
  &updatable_cmd_buf_handle));
  ASSERT_NE(updatable_cmd_buf_handle, nullptr);
-
- // Currently there are synchronization issue with immediate submission when used for command buffers.
- // So, create queue with batched submission for this test suite if the backend is Level Zero.
- if (backend == UR_PLATFORM_BACKEND_LEVEL_ZERO) {
- ur_queue_flags_t flags = UR_QUEUE_FLAG_SUBMISSION_BATCHED;
- ur_queue_properties_t props = {
- /*.stype =*/UR_STRUCTURE_TYPE_QUEUE_PROPERTIES,
- /*.pNext =*/nullptr,
- /*.flags =*/flags,
- };
- ASSERT_SUCCESS(urQueueCreate(context, device, &props, &queue));
- ASSERT_NE(queue, nullptr);
- } else {
- queue = urCommandBufferExpExecutionTest::queue;
- }
  }
 
  void TearDown() override {
  if (updatable_cmd_buf_handle) {
  EXPECT_SUCCESS(urCommandBufferReleaseExp(updatable_cmd_buf_handle));
  }
- if (backend == UR_PLATFORM_BACKEND_LEVEL_ZERO && queue) {
- ASSERT_SUCCESS(urQueueRelease(queue));
- }
-
  UUR_RETURN_ON_FATAL_FAILURE(
  urCommandBufferExpExecutionTest::TearDown());
  }
 
  ur_exp_command_buffer_handle_t updatable_cmd_buf_handle = nullptr;
- ur_queue_handle_t queue = nullptr;
 };
 
 struct urCommandBufferCommandExpTest