misc: Remove GetDisplayInfoWSI()

This entry point was a challenge for loader to handle correctly. Since it is
going away in the new WSI proposal remove it in all components.
diff --git a/icd/nulldrv/nulldrv.c b/icd/nulldrv/nulldrv.c
index ff0a901..651b367 100644
--- a/icd/nulldrv/nulldrv.c
+++ b/icd/nulldrv/nulldrv.c
@@ -849,6 +849,7 @@
     VK_FORMAT_B8G8R8A8_UNORM,
 };
 
+#if 0
 ICD_EXPORT VkResult VKAPI vkGetDisplayInfoWSI(
     VkDisplayWSI                            display,
     VkDisplayInfoTypeWSI                    infoType,
@@ -889,6 +890,7 @@
 
     return ret;
 }
+#endif
 
 ICD_EXPORT VkResult VKAPI vkCreateSwapChainWSI(
     VkDevice                                device,