RFR: Remove dead code [v2]

[Jorn Vernee]

On Wed, 13 Dec 2023 01:49:46 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> Remove the last little bits of dead code. As found through code coverage report.
>
> Jorn Vernee has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - last few bits
>  - remove more dead code

src/main/java/org/openjdk/jextract/impl/ClassSourceBuilder.java line 113:

> 111: 
> 112:     final void classEnd() {
> 113:         appendIndentedLines("""

Switching to `appendIndentedLines` here so that `indent` and `append` can be removed.

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PR Review Comment: https://git.openjdk.org/jextract/pull/158#discussion_r1424757332