Missing metadata removal in jdk commit

[Florian Weimer]

I see this in the commit history:

commit 7eb4d4aa018e37052cbf37cd854380006c309645
Author: Kim Barrett <kbarrett at openjdk.org>
Date:   Tue Sep 15 10:52:50 2020 +0000

    8247909: Improve PrimitiveConversions::cast using C++14
    
    Reimpliment PrimitiveConversions::cast, with some cases now constexpr.
    <!-- Anything below this marker will be automatically updated, please do not edit manually! -->
    ---------
    ### Progress
    - [x] Change must not contain extraneous whitespace
    - [x] Commit message must refer to an issue
    - [ ] Change must be properly reviewed
    
    ### Issue
    * [JDK-8247909](https://bugs.openjdk.java.net/browse/JDK-8247909): Improve PrimitiveConversions::cast using C++14
    
    
    ### Download
    `$ git fetch https://git.openjdk.java.net/jdk pull/143/head:pull/143`
    `$ git checkout pull/143`
    
    Reviewed-by: dholmes, stefank

I don't think it makes sense to preserve this information in the Git
history, and the SGML comment suggests that it's expected to be
stripped.