WebGL: Removed unused GraphicsContextGLANGLE::readCompositedResultsForPainting It's called nowhere after 262518@main.
Pull request: https://github.com/WebKit/WebKit/pull/12905
Committed 263146@main (305affe116cd): <https://commits.webkit.org/263146@main> Reviewed commits have been landed. Closing PR #12905 and removing active labels.
<rdar://problem/108279955>