Mark PaymentRequestEvent.p.instrumentKey deprecated and non-standard (#11549)
Mark PaymentRequestEvent.p.instrumentKey deprecated and non-standard (#11549)

https://github.com/w3c/payment-handler/commit/20a0ca9 (https://github.com/w3c/payment-handler/pull/393) dropped PaymentRequestEvent.prototype.instrumentKey from the Payment Handler spec.

So, this change marks it deprecated and non-standard, and drops its spec_url.

Related MDN change: https://github.com/mdn/content/pull/6960
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data