loader: Remove old declaration for KHX extension
diff --git a/loader/extension_manual.h b/loader/extension_manual.h
index f1b7b6b..5ae93bf 100644
--- a/loader/extension_manual.h
+++ b/loader/extension_manual.h
@@ -25,14 +25,6 @@
 // These functions, for whatever reason, require more complex changes than
 // can easily be automatically generated.
 
-/*VKAPI_ATTR VkResult VKAPI_CALL EnumeratePhysicalDeviceGroupsKHR(
-    VkInstance instance, uint32_t *pPhysicalDeviceGroupCount,
-    VkPhysicalDeviceGroupPropertiesKHR *pPhysicalDeviceGroupProperties);
-
-VKAPI_ATTR VkResult VKAPI_CALL terminator_EnumeratePhysicalDeviceGroupsKHR(
-    VkInstance instance, uint32_t *pPhysicalDeviceGroupCount,
-    VkPhysicalDeviceGroupPropertiesKHR *pPhysicalDeviceGroupProperties);*/
-
 VKAPI_ATTR VkResult VKAPI_CALL
 GetPhysicalDeviceExternalImageFormatPropertiesNV(
     VkPhysicalDevice physicalDevice, VkFormat format, VkImageType type,