Fix unused lambda capture warnings (#18662)
Summary:
```
aten/src/ATen/native/cpu/DistanceOpsKernel.cpp.DEFAULT.cpp:109:104: warning: lambda capture 'combs' is not used [-Wunused-lambda-capture]
parallel_for(0, combs, internal::GRAIN_SIZE / (16 * m), [p, self_start, self_end, n, m, res_start, combs](int64_t k, int64_t end) {
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18662
Differential Revision: D14699379
Pulled By: bddppq
fbshipit-source-id: 5062d4327bb5f7b485c2ffa30c98e10576416f03
