Remove Microsoft.Extensions.AI.AzureAIInference

[stephentoub]

Azure.AI.Inference is no longer recommended, e.g. see the "Important" notice at https://learn.microsoft.com/en-us/azure/ai-foundry/foundry-models/supported-languages. We haven't been making any changes to the wrapper, since there hasn't been any changes in the underlying library to react to, and we don't need to continue maintaining the source for the wrapper.

Microsoft Reviewers: Open in CodeFlow

[Copilot]

Pull request overview

This PR removes the Microsoft.Extensions.AI.AzureAIInference library and all its related code, following Microsoft's recommendation that Azure.AI.Inference is no longer the recommended approach. The library has not been actively developed since there have been no changes in the underlying Azure.AI.Inference library to react to.

Key Changes:

• Complete removal of the AzureAIInference integration library source code
• Removal of all associated test files and test infrastructure
• Removal of documentation (README.md, CHANGELOG.md)
• Removal of the Azure.AI.Inference package dependency from the repository

Reviewed changes

Copilot reviewed 18 out of 19 changed files in this pull request and generated no comments.

File	Description
src/Libraries/Microsoft.Extensions.AI.AzureAIInference/*	Removed entire source library including chat client, embedding generators, extensions, and supporting types
test/Libraries/Microsoft.Extensions.AI.AzureAIInference.Tests/*	Removed all test files including unit tests, integration tests, and test helpers
eng/packages/General.props	Removed Azure.AI.Inference package reference from version management

The PR is clean and comprehensive - it removes all traces of the AzureAIInference integration without leaving orphaned references. All deleted files are properly removed as complete files (entire content deleted), which is the appropriate approach for deprecating an entire library.

[jozkee]

From a global search:

extensions/test/Libraries/Microsoft.Extensions.AI.Integration.Tests/README.md

Lines 44 to 59 in 40d04a7

	### Configuring Azure AI Inference tests
	Run commands like the following. The settings will be saved in your user profile.
	```
	cd test/Libraries/Microsoft.Extensions.AI.Integration.Tests
	dotnet user-secrets set AzureAIInference:Endpoint https://YOUR_DEPLOYMENT.azure.com/
	dotnet user-secrets set AzureAIInference:Key abcdefghijkl
	```
	Optionally also run the following. The values shown here are the defaults if you don't specify otherwise:
	```
	dotnet user-secrets set AzureAIInference:ChatModel gpt-4o-mini
	dotnet user-secrets set AzureAIInference:EmbeddingModel text-embedding-3-small
	```

extensions/test/Libraries/Microsoft.Extensions.AotCompatibility.TestApp/Microsoft.Extensions.AotCompatibility.TestApp.csproj

Line 19 in 40d04a7

<LibraryProjects Remove="$(RepoRoot)\src\Libraries\Microsoft.Extensions.AI.AzureAIInference\Microsoft.Extensions.AI.AzureAIInference.csproj" />