Remove unnecessary sources from base CircleCI AMI (#21103)
Summary:
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21103
Differential Revision: D15550213
Pulled By: kostmo
fbshipit-source-id: b4a2c38d168f722b30c96494079ccdd468b9ece8
