Delete Hotspot's LinkedList utility class

[johan-sjolen]

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Progress

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 ⚠️ Pull request body is missing required line: - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/31307/head:pull/31307
$ git checkout pull/31307

Update a local copy of the PR:
$ git checkout pull/31307
$ git pull https://git.openjdk.org/jdk.git pull/31307/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 31307

View PR using the GUI difftool:
$ git pr show -t 31307

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/31307.diff

[bridgekeeper]

👋 Welcome back jsjolen! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@johan-sjolen The following label will be automatically applied to this pull request:

• hotspot

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[openjdk]

The total number of required reviews for this PR has been set to 2 based on the presence of this label: hotspot. This can be overridden with the /reviewers command.