Remove old StyleCop and use built-in analyzer.

src/core/Rsdo.Concordancer.Core/Rsdo.Concordancer.Core.csproj

@@ -1,9 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-    <ItemGroup>
-      <PackageReference Include="Rsdo.StyleCop" />
-    </ItemGroup>
-
     <ItemGroup>
       <ProjectReference Include="..\Rsdo.Concordancer.ServiceModel\Rsdo.Concordancer.ServiceModel.csproj" />
     </ItemGroup>

src/core/Rsdo.Concordancer.Data/Rsdo.Concordancer.Data.csproj

@@ -6,7 +6,6 @@
       <PackageReference Include="FluentMigrator.Runner" />
       <PackageReference Include="FluentMigrator.Runner.Postgres" />
       <PackageReference Include="Npgsql" />
-      <PackageReference Include="Rsdo.StyleCop" />
     </ItemGroup>
 
     <ItemGroup>

src/core/Rsdo.Concordancer.Infrastructure/Rsdo.Concordancer.Infrastructure.csproj

@@ -5,7 +5,6 @@
       <PackageReference Include="Microsoft.Extensions.Configuration" />
       <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" />
       <PackageReference Include="OpenSearch.Client" />
-      <PackageReference Include="Rsdo.StyleCop" />
     </ItemGroup>
 
     <ItemGroup>

src/core/Rsdo.Concordancer.ServiceModel/Rsdo.Concordancer.ServiceModel.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <ItemGroup>
-      <PackageReference Include="Rsdo.StyleCop" />
       <PackageReference Include="Swashbuckle.AspNetCore.Annotations" />
     </ItemGroup>
 

src/core/Rsdo.Concordancer.Services/Rsdo.Concordancer.Services.csproj

@@ -12,7 +12,6 @@
       <PackageReference Include="Newtonsoft.Json" />
       <PackageReference Include="Npgsql" />
       <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" />
-      <PackageReference Include="Rsdo.StyleCop" />
     </ItemGroup>
 
     <ItemGroup>