Remove keygen element as it is deprecated. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/keygen
Remove keygen element as it is deprecated. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/keygen

RELNOTES: n/a
PiperOrigin-RevId: 354631551

google/closure-library,google/closure-library,google/closure-library,google/closure-library,google/closure-library