VS: Remove broken EnableASAN entry from flag table for v143

Apply the change from commit 7fce2d37 (VS: Revert "Add support for
ASAN -fsanitize=address flag", 2021-04-26, v3.21.0-rc1~270^2) to the
v143 flag table.

Issue: #21081

Templates/MSBuild/FlagTables/v143_CL.json

@@ -795,13 +795,6 @@
     "value": "true",
     "flags": []
   },
-  {
-    "name": "EnableASAN",
-    "switch": "fsanitize=address",
-    "comment": "Enable Address Sanitizer",
-    "value": "true",
-    "flags": []
-  },
   {
     "name": "IntrinsicFunctions",
     "switch": "Oi",