remove core

Author: rajkumar-rangaraj

.github/workflows/sanity.yml

@@ -20,7 +20,6 @@ jobs:
       fail-fast: false
       matrix:
         solution: [
-          ./NETCORE/ApplicationInsights.AspNetCore.sln,
           ./Everything.sln,
           ./ProjectsForSigning.sln,
           ./LOGGING/Logging.sln,