RFR: 8334733: Remove obsolete @enablePreview from tests after JDK-83324714

[Adam Sotona]

On Wed, 27 Nov 2024 23:10:15 GMT, Chen Liang <liach at openjdk.org> wrote:

> Remove the redundant `@enablePreview` and `--enable-preview` flags for enabling ClassFile API in the tests.  The remainder of these flags in all tests seem to serve preview APIs (such as ScopedValue) or language features (primitive pattern, module imports, etc.), or testing the enable preview flag itself.  Now there is fewer than 100 `@enablePreview` in the `test` directory.
> 
> To reviewers, there are some redundant changes and notes:
> 
> - There's one security test that used `ModuleInfoWriter` that depends on ClassFile API.
> - Removed unnecessary exports of `jdk.internal.classfile.impl`. Remaining uses are:
>   - `BoundAttribute::payloadLen` for javac attribute tests
>   - Annotation reading/writing for javac annotation tests
> - Line number changes to:
>   - test/langtools/tools/javac/linenumbers/NestedLineNumberTest.java
>   - test/langtools/tools/javac/linenumbers/NullCheckLineNumberTest.java
> - Move from legacy jdk.internal.classfile to java.lang.classfile in:
>   - test/langtools/tools/javac/NoStringToLower.java and 
>   - test/langtools/tools/javac/T8003967/DetectMutableStaticFields.java
> - Weird annotation processor behavior in test/langtools/tools/javac/annotations/parameter/ParameterAnnotations.java
> 
>   - Without preview and using explicit file name, the javac task fails; using the builder live AP object works both with and without preview.
> 
> Testing: tier 1-5.  Please inform me if any of these tests belong to higher tiers.

I would give a go to all trivial removals of `@enablePreview` after a brief check the tests pass.
However all the more complex changes potentially affecting various parts of the JDK infrastructure require deeper review and probably involve more reviewers.
My recommendation for easier review would be to split this 360-files patch into a patch with trivial removals of `@enablePreview` and one or more patches focused on particular area.

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PR Comment: https://git.openjdk.org/jdk/pull/22420#issuecomment-2505408069