[2] remove caffe2 math.h from maskrcnn ops
Summary:
caffe2/utils/math.h depends on protobuf which is not needed for pytorch, so we want to get rid of it.
It turns out maskrcnn ops only need the StorageOrder enum from math.h, so just copy it.
Test Plan:
buck build //xplat/caffe2/fb/custom_ops/maskrcnn:maskrcnnAndroid#android-armv7,shared
buck build //xplat/caffe2/fb/custom_ops/maskrcnn:maskrcnn_aabbAndroid#android-armv7,shared
buck build //xplat/caffe2/fb/custom_ops/maskrcnn:maskrcnn_int8Android#android-armv7,shared
Differential Revision: D35624743
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75760
Approved by: https://github.com/malfet
