Remove unnecessary IOKit sandbox rule in the WebContent process sandbox when ENABLE(WEBCONTENT_GPU_SANDBOX_EXTENSIONS_BLOCKING) = 1.
<rdar://problem/106668157>
Pull request: https://github.com/WebKit/WebKit/pull/11464
Committed 261717@main (631491c3f80c): <https://commits.webkit.org/261717@main> Reviewed commits have been landed. Closing PR #11464 and removing active labels.