Switching from Code Generation -> No code generation doesn't remove designer file

[davkean]

In the old project system, switching from RESX code generation from public/internal -> no code generation removes in the file.

In the new project system the file remains on disk, and due to the globs is part of the project:

1. File -> New Console App (.NET Core)
2. Right-click project, choose Add -> New Item
3. Choose Resources file
4. Click OK
5. In the designer, change Access modifier from "internal" to "no code generation"

Expected: For the designer file to disappear
Actual: It becomes unnested, but stays in the project: