test: Minor clean-up

Add TEST_DESCRIPTION() to ExecuteCommandsPrimaryCB test.
diff --git a/tests/layer_validation_tests.cpp b/tests/layer_validation_tests.cpp
index 022a037..36524a9 100644
--- a/tests/layer_validation_tests.cpp
+++ b/tests/layer_validation_tests.cpp
@@ -10244,8 +10244,8 @@
 }
 
 TEST_F(VkLayerTest, ExecuteCommandsPrimaryCB) {
-    // Attempt vkCmdExecuteCommands w/ a primary cmd buffer (should only be
-    // secondary)
+    TEST_DESCRIPTION("Attempt vkCmdExecuteCommands w/ a primary cmd buffer"
+                     " (should only be secondary)");
 
     m_errorMonitor->SetDesiredFailureMsg(
         VK_DEBUG_REPORT_ERROR_BIT_EXT,
@@ -10255,7 +10255,7 @@
     ASSERT_NO_FATAL_FAILURE(InitRenderTarget());
 
     BeginCommandBuffer();
-    // ASSERT_VK_SUCCESS(err);
+
     VkCommandBuffer primCB = m_commandBuffer->GetBufferHandle();
     vkCmdExecuteCommands(m_commandBuffer->GetBufferHandle(), 1, &primCB);