Fix KernelMemoryBuilderExtensions (#433)

## Motivation and Context (Why the change? What's the scenario?)
This PR fixes the issue described at
#424 (comment).

service/Abstractions/KernelMemoryBuilderExtensions.cs

@@ -80,9 +80,8 @@ public static IKernelMemoryBuilder WithCustomIngestionQueueClientFactory(
     }
 
     public static IKernelMemoryBuilder WithCustomIngestionQueueClientFactory<T>(
-        this IKernelMemoryBuilder builder, T service) where T : QueueClientFactory
+        this IKernelMemoryBuilder builder) where T : QueueClientFactory
     {
-        service = service ?? throw new ConfigurationException("Memory Builder: the ingestion queue client factory instance is NULL");
         builder.AddSingleton<QueueClientFactory, T>();
         return builder;
     }
@@ -96,9 +95,8 @@ public static IKernelMemoryBuilder WithCustomStorage(
     }
 
     public static IKernelMemoryBuilder WithCustomStorage<T>(
-        this IKernelMemoryBuilder builder, T service) where T : class, IContentStorage
+        this IKernelMemoryBuilder builder) where T : class, IContentStorage
     {
-        service = service ?? throw new ConfigurationException("Memory Builder: the content storage instance is NULL");
         builder.AddSingleton<IContentStorage, T>();
         return builder;
     }
@@ -112,9 +110,8 @@ public static IKernelMemoryBuilder WithCustomMimeTypeDetection(
     }
 
     public static IKernelMemoryBuilder WithCustomMimeTypeDetection<T>(
-        this IKernelMemoryBuilder builder, T service) where T : class, IMimeTypeDetection
+        this IKernelMemoryBuilder builder) where T : class, IMimeTypeDetection
     {
-        service = service ?? throw new ConfigurationException("Memory Builder: the MIME type detection instance is NULL");
         builder.AddSingleton<IMimeTypeDetection, T>();
         return builder;
     }
@@ -171,10 +168,8 @@ public static IKernelMemoryBuilder WithCustomTextGenerator(
     }
 
     public static IKernelMemoryBuilder WithCustomTextGenerator<T>(
-        this IKernelMemoryBuilder builder,
-        T service) where T : class, ITextGenerator
+        this IKernelMemoryBuilder builder) where T : class, ITextGenerator
     {
-        service = service ?? throw new ConfigurationException("Memory Builder: the text generator instance is NULL");
         builder.AddSingleton<ITextGenerator, T>();
         return builder;
     }
@@ -189,10 +184,8 @@ public static IKernelMemoryBuilder WithCustomImageOcr(
     }
 
     public static IKernelMemoryBuilder WithCustomImageOcr<T>(
-        this IKernelMemoryBuilder builder,
-        T service) where T : class, IOcrEngine
+        this IKernelMemoryBuilder builder) where T : class, IOcrEngine
     {
-        service = service ?? throw new ConfigurationException("Memory Builder: the OCR engine instance is NULL");
         builder.AddSingleton<IOcrEngine, T>();
         return builder;
     }
@@ -206,9 +199,8 @@ public static IKernelMemoryBuilder WithCustomPromptProvider(
     }
 
     public static IKernelMemoryBuilder WithCustomPromptProvider<T>(
-        this IKernelMemoryBuilder builder, T service) where T : class, IPromptProvider
+        this IKernelMemoryBuilder builder) where T : class, IPromptProvider
     {
-        service = service ?? throw new ConfigurationException("Memory Builder: the prompt provider instance is NULL");
         builder.AddSingleton<IPromptProvider, T>();
         return builder;
     }