-fno-warn lines in the lexer can be removed with Alex 3.1.5

Ömer Sinan Ağacan omeragacan at gmail.com
Sat Sep 10 19:43:08 UTC 2016

I was working on the lexer today and realized that we can now remove
-fno-warn lines in the lexer if we're OK with requiring Alex >=3.1.5.

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