[1] Remove modifierOS · w3c/uievents@0719b2f (2016-02-27 11:51:46 +09:00 版) https://github.com/w3c/uievents/commit/0719b2ffc4390c56d2cffdddc60abe631ecdb02e

[2] Remove 'OS' from list of modifiers in "Constructing Mouse and Keyboar… · w3c/uievents@9f8341b (2016-02-27 11:51:59 +09:00 版) https://github.com/w3c/uievents/commit/9f8341b81f0dc9c3a902f52126346963e96a2143