RFR: 8253392: remove PhaseCCP_DCE declaration

[Liu, Xin]

Thanks, Nils!

First time to try Skara CLI, so far so good! 
The only problem is I forgot to config user.name in my git.  My name is 'ubuntu' this time.
fixed. I will use my name in next PR. 

if it looks good, please help me to 'integrate' this PR. 
thanks,
--lx

________________________________________
From: hotspot-compiler-dev <hotspot-compiler-dev-retn at openjdk.java.net> on behalf of Nils Eliasson <neliasso at openjdk.java.net>
Sent: Monday, September 21, 2020 2:45 AM
To: hotspot-compiler-dev at openjdk.java.net
Subject: RE: [EXTERNAL] RFR: 8253392: remove PhaseCCP_DCE declaration

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On Mon, 21 Sep 2020 08:01:27 GMT, Xin Liu <xliu at openjdk.org> wrote:

> hello, reviewers,
> May I ask to review this trivial patch?
> it's a clean-up. The forward declaration of PhaseCCP_DCE is not useful.

Marked as reviewed by neliasso (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/277