Expand README with local --skip-private-repositories behavior and remove unused import in integration tests

Author: Mpdreamz

aspire/README.md

@@ -45,7 +45,7 @@ dotnet run --project aspire -- --skip-private-repositories
 
 This will automagically scrub the private repositories from assembler.yml and navigation.yml.
 
-Our integration tests, for instance, use this to run tests on CI tokenless.
+Our integration tests, for instance, use this to run tests on CI tokenless. When specifying this option locally we automatically inject `docs-builder`'s own docs into the `navigation.yml`. This allows us to test changes to documentation sets and their effect on assembler during PR's
 
 ## Elasticsearch Instance
 
@@ -86,7 +86,6 @@ Should have these secrets
 > Parameters:DocumentationElasticUrl = https://*.elastic.cloud:443  
 > Parameters:DocumentationElasticApiKey = ****
 
-
 To set them:
 
 ```bash

tests-integration/Elastic.Assembler.IntegrationTests/AssembleFixture.cs

@@ -8,7 +8,6 @@
 using Elastic.Documentation.ServiceDefaults;
 using FluentAssertions;
 using InMemLogger;
-using Microsoft.AspNetCore.Mvc.TagHelpers.Cache;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using static Elastic.Documentation.Aspire.ResourceNames;