layers: Remove unnecessary null pointer checks

Fixes GitHub Issue #6
diff --git a/tests/vkrenderframework.cpp b/tests/vkrenderframework.cpp
index edcc93c..1ff382b 100644
--- a/tests/vkrenderframework.cpp
+++ b/tests/vkrenderframework.cpp
@@ -162,8 +162,7 @@
 }
 
 void VkRenderFramework::ShutdownFramework() {
-    if (m_commandBuffer)
-        delete m_commandBuffer;
+    delete m_commandBuffer;
     if (m_commandPool)
         vkDestroyCommandPool(device(), m_commandPool, NULL);
     if (m_framebuffer)