Delete NuGet config

[withinfocus]

Type of change

- [ ] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [X] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

After past experiments with Renovate and global.json such as #3175, an empty NuGet config doesn't do anything for us.

Code changes

• NuGet.config: Removal.

Before you submit

• Please check for formatting errors (dotnet format --verify-no-changes) (required)
• If making database changes - make sure you also update Entity Framework queries and/or migrations
• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team

[bitwarden-bot]

Checkmarx One – Scan Summary & Details – fcbe8efe-2d4f-4d54-8d58-bfe4e5c3d2e8

No New Or Fixed Issues Found