VS: Remove empty LanguageStandard entries from flag table for v143

Templates/MSBuild/FlagTables/v143_CL.json

@@ -468,13 +468,6 @@
     "value": "false",
     "flags": []
   },
-  {
-    "name": "LanguageStandard",
-    "switch": "",
-    "comment": "Default (ISO C++14 Standard)",
-    "value": "Default",
-    "flags": []
-  },
   {
     "name": "LanguageStandard",
     "switch": "std:c++14",
@@ -503,13 +496,6 @@
     "value": "stdcpplatest",
     "flags": []
   },
-  {
-    "name": "LanguageStandard_C",
-    "switch": "",
-    "comment": "Default (Legacy MSVC)",
-    "value": "Default",
-    "flags": []
-  },
   {
     "name": "LanguageStandard_C",
     "switch": "std:c11",