remove unnecessary change

Author: frank-dong-ms

src/Directory.Build.targets

@@ -5,8 +5,6 @@
   <Target Name="PreparePackageAssets" Condition="'$(CopyPackageAssets)' == 'true'"
           AfterTargets="Build">
 
-    <Message Text="CopyPackageAssets" Importance="High"/>
-
     <ItemGroup Condition="'$(IncludeInPackage)' != ''">
       <PackageAsset Include="$(TargetPath)"
                     RelativePath="$(IncludeInPackage)\lib\$(TargetFramework)" />