Remove customizing individual services section per review feedback

Co-authored-by: AndriySvyryd <[email protected]>

Author: Copilot

entity-framework/core/cli/services.md

@@ -11,28 +11,6 @@ Some services used by the tools are only used at design time. These services are
 
 [!code-csharp[Main](../../../samples/core/Miscellaneous/CommandLine/DesignTimeServices.cs#DesignTimeServices)]
 
-### Customizing individual services
-
-You can also override individual methods in design-time services. For example, to customize how type names are generated in scaffolded code to always use fully-qualified names (which can help avoid compilation errors due to ambiguous type references), you can override the `ShouldUseFullName` method in `CSharpHelper`:
-
-```csharp
-public class MyDesignTimeServices : IDesignTimeServices
-{
-    public void ConfigureDesignTimeServices(IServiceCollection services)
-        => services.AddSingleton<ICSharpHelper, MyCSharpHelper>();
-}
-
-public class MyCSharpHelper : CSharpHelper
-{
-    public MyCSharpHelper(ITypeMappingSource typeMappingSource) : base(typeMappingSource)
-    {
-    }
-
-    public override bool ShouldUseFullName(Type type)
-        => true; // Always use fully-qualified type names
-}
-```
-
 ## Referencing Microsoft.EntityFrameworkCore.Design
 
 Microsoft.EntityFrameworkCore.Design is a DevelopmentDependency package. This means that the dependency won't flow transitively into other projects, and that you cannot, by default, reference its types.