Remove exlicit import of MicroBuild targets/props

Author: Dmitry-Matveev

src/Microsoft.ApplicationInsights.AspNetCore/Microsoft.ApplicationInsights.AspNetCore.csproj

@@ -89,11 +89,7 @@
   </ItemGroup>
 
   <ImportGroup Condition=" '$(OS)' == 'Windows_NT' ">
-    <!--5 files are required for signing in this order: Signing.props, MicroBuild.Core.props, and MicroBuild.Core.targets-->
+    <!-- 1 file is required for signing: Signing.props -->
     <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), 'Signing.props'))\Signing.props" />
-    <!--<Import Project="$(NuGetPackageRoot)MicroBuild.Core.0.3.0\build\MicroBuild.Core.props" Condition="Exists('$(NuGetPackageRoot)\MicroBuild.Core.0.3.0\build\MicroBuild.Core.props')"/>-->
-    <!--<Import Project="$(NuGetPackageRoot)MicroBuild.Core.0.3.0\buildCrossTargeting\MicroBuild.Core.props" Condition="Exists('$(NuGetPackageRoot)MicroBuild.Core.0.3.0\buildCrossTargeting\MicroBuild.Core.props')"/>-->
-    <!--<Import Project="$(NuGetPackageRoot)MicroBuild.Core.0.3.0\build\MicroBuild.Core.targets" Condition="Exists('$(NuGetPackageRoot)MicroBuild.Core.0.3.0\build\MicroBuild.Core.targets')"/>-->
-    <!--<Import Project="$(NuGetPackageRoot)MicroBuild.Core.0.3.0\buildCrossTargeting\MicroBuild.Core.targets" Condition="Exists('$(NuGetPackageRoot)MicroBuild.Core.0.3.0\buildCrossTargeting\MicroBuild.Core.targets')"/>-->
   </ImportGroup>
 </Project>