RFR: 8345698: Remove tier1_compiler_not_xcomp from github actions

[SendaoYan]

On Fri, 6 Dec 2024 17:32:09 GMT, Leonid Mesnik <lmesnik at openjdk.org> wrote:

> The fix for
> https://bugs.openjdk.org/browse/JDK-8345435
> delete tier1_compiler_not_xcomp group
> but don't remove corresponding testing from github actions.

Marked as reviewed by syan (Committer).

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PR Review: https://git.openjdk.org/jdk/pull/22612#pullrequestreview-2487439416