remove obsolete PackageReference statement

Author: Bertk

test/coverlet.core.tests/coverlet.core.tests.csproj

@@ -22,8 +22,6 @@
     <PackageReference Include="System.Reflection.Metadata" />
     <PackageReference Include="Tmds.ExecFunction" />
     <PackageReference Include="xunit.v3" />
-    <PackageReference Include="xunit.v3.core" />
-    <PackageReference Include="xunit.v3.extensibility.core" />
     <PackageReference Include="xunit.runner.visualstudio">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

test/coverlet.integration.tests/coverlet.integration.tests.csproj

@@ -13,7 +13,6 @@
     <PackageReference Include="Moq" Version="4.20.70" />
     <PackageReference Include="NuGet.Packaging" Version="6.6.2" />
     <PackageReference Include="xunit.v3" Version="1.0.0" />
-    <PackageReference Include="xunit.v3.common" Version="1.0.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>