Remove ES2015 tests than do not parse in ES2016 #4501
Merged
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The test fragments contain code that are valid ES2015 programs, but not valid ES2016 ones (they were originally from Traceur, which does not fully support ES2016). To support the ES2016 semantics in Babylon (babel/babylon#106), these tests must be removed.
Specifically, per e.g. ECMA-262 7th Edition § 14.1.2:
Similar clauses cover arrow functions, methods, and generator functions/methods, as well as async functions and async arrow functions.