ESLint parserOptions is reduntand when es6 env is used
ESLint parserOptions is reduntand when es6 env is used

Bug: T171848
Change-Id: I27ad1fc514d7420f18601990beaf1411cd6d8687

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo