Remove additional references. Add back required test sdk reference.

Author: mdaigle

src/Microsoft.Data.SqlClient/tests/UnitTests/Microsoft.Data.SqlClient.UnitTests.csproj

@@ -11,6 +11,7 @@
   </PropertyGroup>
   <!-- XUnit and XUnit extensions -->
   <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(MicrosoftNETTestSdkVersion)" />
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="$(MicrosoftNETFrameworkReferenceAssembliesVersion)" Condition="$(TargetGroup) == 'netfx'">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
@@ -27,12 +28,6 @@
     </PackageReference>
     <PackageReference Include="Microsoft.DotNet.XUnitExtensions" Version="$(MicrosoftDotNetXUnitExtensionsVersion)" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetGroup)' == 'netcoreapp'">
-    <PackageReference Include="System.Data.Odbc" Version="$(SystemDataOdbcVersion)" />
-  </ItemGroup>
-  <ItemGroup Condition="$(TargetFramework.StartsWith('netcoreapp'))">
-    <Compile Include="SslOverTdsStreamTest.cs" />
-  </ItemGroup>
   <ItemGroup>
     <ProjectReference Condition="'$(TargetGroup)'=='netcoreapp' AND $(ReferenceType)=='Project'" Include="$(NetCoreSource)src\Microsoft.Data.SqlClient.csproj" />
     <ProjectReference Condition="'$(TargetGroup)'=='netfx' AND $(ReferenceType)=='Project'" Include="$(NetFxSource)src\Microsoft.Data.SqlClient.csproj" />
@@ -45,9 +40,6 @@
       <TargetPath>%(Filename)%(Extension)</TargetPath>
     </ContentWithTargetPath>
   </ItemGroup>
-  <ItemGroup>
-    <PackageReference Condition="$(ReferenceType.Contains('Package'))" Include="Azure.Identity" Version="$(AzureIdentityVersion)" />
-  </ItemGroup>
   <ItemGroup>
     <ContentWithTargetPath Include="..\tools\Microsoft.Data.SqlClient.TestUtilities\xunit.runner.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>