RFR: 8255909: Remove unused delayed_value methods

[Yumin Qi]

On Wed, 4 Nov 2020 22:12:29 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> Usage of and definitions of Assembler::delayed_value have been removed, but declarations linger along with various platform specific definitions of delayed_value_impl (all of which areunused) 
> 
> Clean up and remove. 
> 
> Untested on arm/aarch/ppc/s390, but as there are no mentions of delayed_value in the repository after this cleanup this is hopefully OK.

Looks good to me.

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Marked as reviewed by minqi (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1065