Revert redirection change.

Author: Colin Robertson

.openpublishing.redirection.json

@@ -7468,16 +7468,6 @@
             "redirect_url": "/cpp/mfc/mfc-library-versions",
             "redirect_document_id": false
         },
-        {
-            "source_path": "docs/overview/2017/cpp-conformance-improvements-2017.md",
-            "redirect_url": "/cpp/overview/cpp-conformance-improvements",
-            "redirect_document_id": false
-        },
-        {
-            "source_path": "docs/overview/2019/cpp-conformance-improvements-2019.md",
-            "redirect_url": "/cpp/overview/cpp-conformance-improvements",
-            "redirect_document_id": false
-        },
         {
             "source_path": "docs/parallel/openmp/contents.md",
             "redirect_url": "/cpp/parallel/openmp/openmp-c-and-cpp-application-program-interface",