Kill a number of unused THCUNN operators. (#26970)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26970
I believe these were only being (self)-referenced by direct THCUNN bindings, which were killed in the https://github.com/pytorch/pytorch/pull/25358 stack.
This list is NOT exhaustive of what can be removed, and notably doesn't include THNN:
Abs, DistKLDivCriterion, FeatureLPPooling, IndexLinear, L1Cost, LookupTableBag, MarginCriterion, SpatialConvolutionLocal, SpatialCrossMapLRn.
Test Plan: Imported from OSS
Differential Revision: D17628216
Pulled By: gchanan
fbshipit-source-id: 0a0b17b446cf8ec9adef631f6f5c515182b560bb
