[WebGPU] Remove unsupported timestamp query functionality from WebGPU.framework
radar://126912548
Pull request: https://github.com/WebKit/WebKit/pull/28114
*** Bug 268244 has been marked as a duplicate of this bug. ***
Committed 278468@main (9d74d3a31e3c): <https://commits.webkit.org/278468@main> Reviewed commits have been landed. Closing PR #28114 and removing active labels.