stateless: Remove ValidatePnextPropertyStructContents() #10392

Job	Run time
code-format	27s
check_vvl	1m 9s
linux (address sanitizer, debug, robinhood ON )	32m 41s
android (arm64-v8a, ON, c++_shared)	8m 42s
androidOnLinux	3m 3s
linux (address sanitizer, release, robinhood ON )	15m 6s
chromium (target_os="linux" target_cpu="x64")	8m 7s
android (armeabi-v7a, OFF, c++_static)	2m 19s
linux (address sanitizer, release, robinhood OFF )	15m 21s
chromium (target_os="android" target_cpu="arm64")	11m 38s
linux (thread sanitizer, release, robinhood ON )	6m 12s
windows (amd64)	10m 31s
mingw	2m 9s
windows (amd64_x86)	11m 7s
iOS	3m 11s
androidUpload	0s
windowsUpload	0s
linux Upload	0s
	2h 11m 43s

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