Remove redundant declarations (#16463)
Summary:
As there are no checks that all the functions are actually being used, we can end up with stale entries. This diff removes unused entries from Declarations.cwrap
Testing:
Successful build via "python setup.py develop"
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16463
Differential Revision: D13885815
Pulled By: izdeby
fbshipit-source-id: 4e35c2ac9196167af74dff3d4f971210721285f8
