RFR: 8294053: Unneeded local variable in handle_safefetch()

[David Holmes]

On Wed, 21 Sep 2022 10:11:55 GMT, Fredrik Bredberg <duke at openjdk.org> wrote:

> and is initialized to the same value as is passed into the handle_safefetch() function by its callers.

Took me a bit to check that due to some confusing logic around SIGILL and SIGFPE handling.
But I'm not clear about what will happen on Zero - it will always pass a pc of NULL where currently we will get it from `ucontext_get_pc(uc)`.

Thanks

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PR: https://git.openjdk.org/jdk/pull/10373