layers: Remove layer prefix from log_msg calls

Change-Id: Iea43bd2f8f2c92d99b5fdf40abe94149a6fb860c
diff --git a/layers/unique_objects.cpp b/layers/unique_objects.cpp
index d132393..51bf57c 100644
--- a/layers/unique_objects.cpp
+++ b/layers/unique_objects.cpp
@@ -72,7 +72,7 @@
         // Check for recognized instance extensions
         if (!white_list(pCreateInfo->ppEnabledExtensionNames[i], kInstanceExtensionNames)) {
             log_msg(instance_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT, 0,
-                    VALIDATION_ERROR_UNDEFINED, "UniqueObjects",
+                    VALIDATION_ERROR_UNDEFINED,
                     "Instance Extension %s is not supported by this layer.  Using this extension may adversely affect validation "
                     "results and/or produce undefined behavior.",
                     pCreateInfo->ppEnabledExtensionNames[i]);
@@ -88,7 +88,7 @@
         // Check for recognized device extensions
         if (!white_list(pCreateInfo->ppEnabledExtensionNames[i], kDeviceExtensionNames)) {
             log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT, 0,
-                    VALIDATION_ERROR_UNDEFINED, "UniqueObjects",
+                    VALIDATION_ERROR_UNDEFINED,
                     "Device Extension %s is not supported by this layer.  Using this extension may adversely affect validation "
                     "results and/or produce undefined behavior.",
                     pCreateInfo->ppEnabledExtensionNames[i]);