RFR: 8318100: Remove redundant check for Metal support

[Phil Race]

On Mon, 23 Oct 2023 16:46:24 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

> We have updated minimum macOS version on which JDK can be used to macOS 11 and we have check to enable metal pipeline only when macOS version is >=10.14.
> 
> Since minimum macOS version is updated we don't need this check now.
> Removed redundant check and ran all clientlibs tests on CI for verification.
> Also ran a sample program with different combination of sun.java2d.metal and sun.java2d.opengl flags and i see that appropriate pipeline is getting selected.

Marked as reviewed by prr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/16316#pullrequestreview-1693301138