Fix #4430 (wrong exception raising during URL Rewrites saving process). #4984
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This PR is intended to fix the #4430 issue.
The problematic double exception raising is deleted since it should be manage by the
::doReplace
method as mentioned in its PHPDoc and as implemented into theMagento\UrlRewrite\Model\Storage\DbStorage
class.The exception handling in
::doReplace
provides enough guarantees to avoid duplicate url keys.I suspect some kind of bug into the PHP engine (tested with PHP 7.0.6) since the original code seems valid to me but I was not able to figure what was wrong.