Nicolas Vasilache 362557e11c Simplify compositions of AffineApply
This CL is the 6th and last on the path to simplifying AffineMap composition.
This removes `AffineValueMap::forwardSubstitutions` and replaces it by simple
calls to `fullyComposeAffineMapAndOperands`.

PiperOrigin-RevId: 228962580
2019-03-29 15:11:56 -07:00
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2019-03-29 15:11:56 -07:00
2019-03-29 12:41:43 -07:00