Revert "AspNetBufferingWrapper also included for NLog.Web.AspNetCore"

This reverts commit be3e18b.

Author: snakefoot

config/targets.json

@@ -348,10 +348,7 @@
         "name": "AspNetBufferingWrapper",
         "page": "AspNetBufferingWrapper-target",
         "description": "Buffers log events for the duration of ASP.NET request and sends them down to the wrapped target at the end of a request.",
-        "package": [
-            "NLog.Web",
-            "NLog.Web.AspNetCore"
-        ],
+        "package": "NLog.Web",
         "wrapper": true,
         "platforms": [
             "net35",