Remove deprecated describeEnum from framework

[AbdeMohlbi]

this change removes the describeEnum method from the framework, describeEnum was used to get a short description of an enum value, this became redundant with the name getter on Enum which was introduced in Dart 2.14.

for reference see:

• deprecation PR Use EnumName.name where possible. #94496
• add describeEnum removal breaking change entry and migration guide website#13682

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[gemini-code-assist]

Code Review

This pull request removes the deprecated describeEnum function from diagnostics.dart along with its corresponding unit tests in diagnostics_test.dart. There are no review comments, and I have no feedback to provide.

[navaronbracke]

LGTM

According to https://github.com/search?q=repo%3Aflutter%2Fflutter%20describeEnum&type=code

there's only these two usages, so I think we're good!

[Piinks]

We should open a migration guide in flutter/website to have this listed under breaking changes when it is released

[AbdeMohlbi]

We should open a migration guide in flutter/website to have this listed under breaking changes when it is released

Is there an example that i could look at ?

[Piinks]

We should open a migration guide in flutter/website to have this listed under breaking changes when it is released

Is there an example that i could look at ?

Yup yup!

flutter/website#13457 is an example.

There is a template in https://github.com/flutter/website/blob/main/sites/docs/src/content/release/breaking-changes/template.md

[AbdeMohlbi]

We should open a migration guide in flutter/website to have this listed under breaking changes when it is released

Is there an example that i could look at ?

Yup yup!

flutter/website#13457 is an example.

There is a template in https://github.com/flutter/website/blob/main/sites/docs/src/content/release/breaking-changes/template.md

opened flutter/website#13682

[Piinks]

For posterity, can you fill out the PR description and why we are removing this now? Might be good to also link back to the PR it was deprecated for future archeologists. :)

[AbdeMohlbi]

For posterity, can you fill out the PR description and why we are removing this now? Might be good to also link back to the PR it was deprecated for future archeologists. :)

done

[Piinks]

LGTM