Remove unused DOMParserWrapper and strip down PDEXMLHelper #417

Job	Run time
build / Upload Event File	2s
build / Verify Linux	23m 18s
build / Verify Windows	26m 18s
build / Verify MacOS	23m 20s
check-freeze-period / verify-freeze-period	2s
check-merge-commits / Block Merge Commits	8s
	1h 13m 8s

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